Page: 4 of 5
Section: 16 of 23 2248 Listings
Sections: | 16 Ol-Po | | 17 Po-Re | | 18 Re-Sa | | 19 Sa-Sm | | 20 Sm-Su |
| Feature Name | County | Type | Latitude | Longitude | Alt | USGS 7.5' Map |
| Oasis | Mendocino | pop place | 385858N | 1230010W | 1920 | Hopland |
| Oat Gap | Mendocino | gap | 392344N | 1230337W | 3228 | Van Arsdale Reservoir |
| Oat Ridge | Mendocino | ridge | 392907N | 1231618W | - | Willits |
| Oat Valley Creek | Mendocino | stream | 384900N | 1230037W | - | Cloverdale |
| Observatory Hill | Mendocino | summit | 392028N | 1234312W | 953 | Mathison Peak |
| Ocean Ridge Airport | Mendocino | airport | 384804N | 1233149W | 940 | Gualala |
| Oconner Orchard | Mendocino | locale | 393715N | 1234001W | - | Dutchmans Knoll |
| Ogles Ranch | Mendocino | locale | 385415N | 1232030W | - | Ornbaun Valley |
| Old Bailey Place | Mendocino | pop place | 391005N | 1232853W | 952 | Bailey Ridge |
| Old Camp 19 (historical) | Mendocino | locale | 392114N | 1233631W | - | Comptche |
| Old Camp Seven | Mendocino | locale | 392536N | 1233409W | - | Northspur |
| Old Fulwider Ranch | Mendocino | locale | 392613N | 1231427W | - | Foster Mountain |
| Old Hopland | Mendocino | pop place | 385833N | 1230557W | 500 | Hopland |
| Old Man Ridge | Mendocino | ridge | 393913N | 1230414W | - | Thatcher Ridge |
| Old Northwestern Mill (historical) | Mendocino | locale | 392604N | 1232250W | - | Burbeck |
| Old Ornbaun Hot Springs | Mendocino | pop place | 385445N | 1231835W | 1200 | Ornbaun Valley |
| Old Red Rock Place | Mendocino | pop place | 384735N | 1232627W | 1760 | McGuire Ridge |
| Old Wilburn Ranch | Mendocino | valley | 393201N | 1231339W | - | Brushy Mountain |
| Old Woman Canyon | Mendocino | valley | 393201N | 1231339W | - | Brushy Mountain |
| Old Womans Canyon | Mendocino | valley | 393201N | 1231339W | - | Brushy Mountain |
| Olde Camp Seven (historical) | Mendocino | locale | 392536N | 1233409W | - | Northspur |
| Olds Creek | Mendocino | stream | 392514N | 1233008W | - | Northspur |
| One Eyed Creek | Mendocino | stream | 394234N | 1232405W | - | Laytonville |
| Onion Patch Gulch | Mendocino | valley | 391123N | 1233601W | - | Navarro |
| Orchard Camp | Mendocino | locale | 395511N | 1235631W | - | Bear Harbor |
| Oregon Grape Trail | Mendocino | trail | 392619N | 1232233W | - | Burbeck |
| Ornbaun Creek | Mendocino | stream | 385653N | 1231920W | - | Ornbaun Valley |
| Ornbaun Creek | Mendocino | stream | 390120N | 1232256W | - | Philo |
| Ornbaun Ranch | Mendocino | locale | 385525N | 1231733W | - | Ornbaun Valley |
| Ornbaun Springs | Mendocino | spring | 385439N | 1231821W | - | Ornbaun Valley |
| Ornbaun Springs Cemetery | Mendocino | cemetery | 385455N | 1231823W | - | Ornbaun Valley |
| Ornbaun Valley | Mendocino | basin | 385448N | 1231807W | - | Ornbaun Valley |
| Orrs (historical) | Mendocino | pop place | 391346N | 1232149W | 920 | Orrs Springs |
| Orrs Creek | Mendocino | stream | 390933N | 1231116W | - | Ukiah |
| Orrs Hot Sulphur Springs | Mendocino | pop place | 391346N | 1232149W | 920 | Orrs Springs |
| Orrs Springs | Mendocino | pop place | 391346N | 1232149W | 920 | Orrs Springs |
| Osborn Ranger Station | Mendocino | locale | 395359N | 1230026W | - | Leech Lake Mountain |
| Osborn Station | Mendocino | locale | 395359N | 1230026W | - | Leech Lake Mountain |
| Otis R Johnson Park | Mendocino | park | 392641N | 1234735W | - | Fort Bragg |
| Outlet | Mendocino | locale | 392807N | 1232144W | - | Willits |
| Outlet Creek | Mendocino | stream | 393737N | 1232039W | - | Dos Rios |
| P C Crawford Ranch | Mendocino | locale | 390051N | 1230833W | - | Elledge Peak |
| Pacific Ocean | Mendocino | sea | 362558N | 1215654W | 0 | Soberanes Point |
| Packard Ridge | Mendocino | ridge | 393858N | 1234253W | - | Lincoln Ridge |
| Padding River | Mendocino | stream | 392733N | 1234827W | - | Fort Bragg |
| Palmer Creek | Mendocino | stream | 385206N | 1232339W | - | McGuire Ridge |
| Panther Ridge | Mendocino | ridge | 393303N | 1225359W | - | Hull Mountain |
| Panther Rock | Mendocino | summit | 393344N | 1225329W | 3880 | Hull Mountain |
| Panther Rock | Mendocino | summit | 395106N | 1231134W | 1800 | Covelo East |
| Paradise Valley | Mendocino | valley | 394030N | 1231057W | - | Jamison Ridge |
| Paralyze Canyon | Mendocino | valley | 394305N | 1233610W | - | Cahto Peak |
| Pardalo Peak | Mendocino | summit | 385152N | 1231634W | 2470 | Gube Mountain |
| Pardaloe Creek | Mendocino | stream | 385347N | 1232157W | - | Ornbaun Valley |
| Pardaloe Peak | Mendocino | summit | 385152N | 1231634W | 2470 | Gube Mountain |
| Pardaloe Ranch | Mendocino | locale | 385233N | 1231833W | - | Ornbaun Valley |
| Pardini Ranch | Mendocino | locale | 385142N | 1230217W | - | Cloverdale |
| Park Gulch | Mendocino | valley | 392135N | 1233316W | - | Comptche |
| Parker Creek | Mendocino | stream | 395908N | 1235031W | - | Piercy |
| Parkinson Gulch | Mendocino | valley | 390508N | 1232435W | - | Philo |
| Parlin Creek | Mendocino | stream | 392210N | 1233934W | - | Mathison Peak |
| Parsons Creek | Mendocino | stream | 390217N | 1230734W | - | Elledge Peak |
| Patsy Creek | Mendocino | stream | 393449N | 1233418W | - | Sherwood Peak |
| Peachtree Flat | Mendocino | flat | 384813N | 1232854W | - | McGuire Ridge |
| Peat Pasture Gulch | Mendocino | valley | 390745N | 1233141W | - | Navarro |
| Pedro Corrals | Mendocino | locale | 393948N | 1231432W | - | Jamison Ridge |
| Pedro Opening | Mendocino | gap | 394901N | 1233744W | - | Leggett |
| Pedro Ridge | Mendocino | ridge | 393919N | 1231440W | - | Jamison Ridge |
| Pepper Gap | Mendocino | gap | 393324N | 1232027W | - | Willis Ridge |
| Pepperwood Creek | Mendocino | stream | 395508N | 1231145W | - | Bluenose Ridge |
| Pepperwood Gulch | Mendocino | valley | 392911N | 1231720W | - | Willits |
| Perata Ranch (historical) | Mendocino | locale | 393825N | 1230703W | - | Thatcher Ridge |
| Perry Gulch | Mendocino | valley | 390742N | 1233442W | - | Navarro |
| Perry Ridge | Mendocino | ridge | 395022N | 1231613W | - | Covelo West |
| Perry Ridge Lake | Mendocino | lake | 395050N | 1231607W | - | Covelo West |
| Pershaver Ranch | Mendocino | locale | 385641N | 1230733W | - | Yorkville |
| Petersen | Tehama | pop place | 395242W | 1224546N | 3160 | Ball Mountian |
| Peterson Creek | Mendocino | stream | 394516N | 1233503W | - | Tan Oak Park |
| Peterson Gulch | Mendocino | valley | 391825N | 1233843W | - | Mathison Peak |
| Peterson Gulch | Mendocino | valley | 392317N | 1234053W | - | Noyo Hill |
| Peterson Opening | Mendocino | gap | 395957N | 1234004W | - | Noble Butte |
| Peterson Ridge | Mendocino | ridge | 390232N | 1232740W | - | Philo |
| Phelps Ridge | Mendocino | ridge | 385426N | 1232513W | - | Zeni Ridge |
| Philbrick Mill | Mendocino | pop place | 390456N | 1232939W | 520 | Philo |
| Philo | Mendocino | pop place | 390357N | 1232638W | 280 | Philo |
| Pickrell Creek | Mendocino | stream | 394227N | 1231924W | - | Dos Rios |
| Pierce Ranch | Mendocino | locale | 385818N | 1233958W | - | Point Arena |
| Piercy | Mendocino | pop place | 395759N | 1234739W | 800 | Piercy |
| Piercy Creek | Mendocino | stream | 395827N | 1234812W | - | Piercy |
| Pieta | Mendocino | pop place | 385536N | 1230315W | 480 | Hopland |
| Pieta Creek | Mendocino | stream | 385525N | 1230328W | - | Hopland |
| Piggy Springs | Mendocino | spring | 394017N | 1232602W | - | Laytonville |
| Pigpen Gulch | Mendocino | valley | 391834N | 1232745W | - | Greenough Ridge |
| Pigtail Creek | Mendocino | stream | 393909N | 1231138W | - | Jamison Ridge |
| Pim Creek | Mendocino | stream | 393501N | 1232749W | - | Longvale |
| Pine Flat | Mendocino | flat | 395646N | 1231707W | - | Mina |
| Pine Grove | Mendocino | pop place | 392058N | 1234847W | 182 | Mendocino |
| Pine Grove Cemetery | Mendocino | cemetery | 394858N | 1231636W | - | Covelo West |
| Pine Lake Basin | Mendocino | basin | 392107N | 1231106W | - | Redwood Valley |
| Pine Mountain | Mendocino | summit | 385121N | 1225708W | 3000 | Asti |
| Pine Ridge | Mendocino | ridge | 390816N | 1231836W | - | Orrs Springs |
| Pine Ridge | Mendocino | ridge | 395436N | 1230502W | - | Leech Lake Mountain |
| Pine Ridge School (historical) | Mendocino | school | 390754N | 1231640W | - | Orrs Springs |
| Pinewood Campground | Mendocino | locale | 392929N | 1234722W | - | Fort Bragg |
| Pinoliville Rancheria | Mendocino | locale | 391048N | 1231304W | - | Ukiah |
| Pinto Creek | Mendocino | stream | 394420N | 1225556W | - | Plaskett Ridge |
| Pioneer Cemetery | Mendocino | cemetery | 394437N | 1231206W | - | Jamison Ridge |
| Piper Ranch | Mendocino | locale | 385818N | 1233148W | - | Eureka Hill |
| Pleasant Valley | Mendocino | valley | 391426N | 1234306W | - | Elk |
| Point Arena | Mendocino | cape | 385721N | 1234425W | - | Point Arena |
| Point Arena | Mendocino | pop place | 385432N | 1234131W | 219 | Point Arena |
Section: 17 of 23
| Feature Name | County | Type | Latitude | Longitude | Alt | USGS 7.5' Map |
| Point Arena Creek | Mendocino | stream | 385450N | 1234234W | - | Point Arena |
| Point Arena Light (1870) | Mendocino | locale | 385717N | 1234422W | - | Point Arena |
| Point Arena Lighthouse (1870) | Mendocino | locale | 385717N | 1234422W | - | Point Arena |
| Point Cabrillo | Mendocino | cape | 392058N | 1234938W | - | Mendocino |
| Point Cabrillo Light | Mendocino | locale | 392055N | 1234934W | - | Mendocino |
| Point Cabrillo Lighthouse | Mendocino | locale | 392055N | 1234934W | - | Mendocino |
| Point Cabrillo Light Station | Mendocino | locale | 392055N | 1234934W | - | Mendocino |
| Point No Pass | Mendocino | cliff | 395820N | 1235922W | - | Bear Harbor |
| Poison Rock | Mendocino | summit | 394344N | 1230147W | 5556 | Thatcher Ridge |
| Pole Bars | Mendocino | flat | 392536N | 1230525W | - | Van Arsdale Reservoir |
| Pole Bars | Mendocino | bar | 392536N | 1230547W | - | Van Arsdale Reservoir |
| Pole Point | Mendocino | summit | 393605N | 1225516W | 6163 | Hull Mountain |
| Poles Bars | Mendocino | flat | 392536N | 1230525W | - | Van Arsdale Reservoir |
| Pomo | Mendocino | pop place | 391824N | 1230541W | 940 | Potter Valley |
| Pomo Indian Reservation | Mendocino | locale | 391829N | 1230656W | - | Potter Valley |
| Pomo Picnic Area | Mendocino | locale | 391353N | 1231057W | - | Ukiah |
| Pony Meadows | Mendocino | flat | 395722N | 1225708W | - | Buck Rock |
| Pony Ridge | Mendocino | ridge | 395816N | 1225625W | - | Buck Rock |
| Poonkinny Creek | Mendocino | stream | 394309N | 1232016W | - | Dos Rios |
| Poonkinny Lake | Mendocino | lake | 394258N | 1231959W | - | Dos Rios |
| Poonkinny Ridge | Mendocino | ridge | 394730N | 1231949W | - | Covelo West |
| Poonkiny Creek | Mendocino | stream | 394309N | 1232016W | - | Dos Rios |
| Poor Mans Creek | Mendocino | stream | 394939N | 1230827W | - | Covelo East |
| Poor Mans Valley | Mendocino | basin | 394938N | 1230944W | - | Covelo East |
| Poor Ranch | Mendocino | locale | 390022N | 1230346W | - | Purdys Gardens |
| Portuguese Gulch | Mendocino | valley | 391728N | 1233629W | - | Comptche |
| Post Camp | Mendocino | locale | 394256N | 1225952W | - | Plaskett Ridge |
| Pothole Creek | Mendocino | stream | 395655N | 1230130W | - | Leech Lake Mountain |
| Pothole Crossing | Mendocino | locale | 395702N | 1230132W | - | Leech Lake Mountain |
| Potter Valley | Mendocino | pop place | 391920N | 1230643W | 945 | Potter Valley |
| Potter Valley | Mendocino | valley | 391623N | 1230533W | - | Potter Valley |
| Potter Valley Cemetery | Mendocino | cemetery | 391751N | 1230626W | - | Potter Valley |
| Potter Valley Rancheria | Mendocino | locale | 391829N | 1230656W | - | Potter Valley |
| Poverty Gulch | Mendocino | valley | 391546N | 1233139W | - | Comptche |
| Pratt Place | Mendocino | pop place | 395447N | 1234314W | 1740 | Noble Butte |
| Pratt Ranch (historical) | Mendocino | locale | 390007N | 1230500W | - | Purdys Gardens |
| Pregnant Spring | Mendocino | spring | 385711N | 1231219W | - | Yorkville |
| Presley Ranch | Mendocino | locale | 392318N | 1230448W | 1994 | Van Arsdale Reservoir |
| Pressley Ranch | Mendocino | locale | 392317N | 1230447W | - | Van Arsdale Reservoir |
| Presswood | Mendocino | pop place | 391006N | 1231217W | 620 | Ukiah |
| Preston Ranch (historical) | Mendocino | locale | 393436N | 1231846W | - | Willis Ridge |
| Pudding Creek | Mendocino | stream | 392733N | 1234827W | - | Fort Bragg |
| Pudding Creek Beach | Mendocino | beach | 392720N | 1234818W | - | Fort Bragg |
| Pudding River | Mendocino | stream | 392733N | 1234827W | - | Fort Bragg |
| Purdys Gardens | Mendocino | locale | 390644N | 1230534W | - | Purdys Gardens |
| Pyramid Ridge | Mendocino | ridge | 390234N | 1230333W | - | Purdys Gardens |
| Quin Loven Gulch | Mendocino | valley | 384807N | 1233435W | - | Gualala |
| Quinliven Gulch | Mendocino | valley | 384807N | 1233435W | - | Gualala |
| Quinlivin Gulch | Mendocino | valley | 384807N | 1233435W | - | Gualala |
| Rackout Spring | Mendocino | spring | 393319N | 1230924W | Brushy Mountain | |
| Railroad Camp | Mendocino | locale | 395506N | 1235621W | Bear Harbor | |
| Railroad Gulch | Mendocino | valley | 391426N | 1234311W | Elk | |
| Railroad Gulch | Mendocino | valley | 391854N | 1234232W | Mathison Peak | |
| Railroad Gulch | Mendocino | valley | 391546N | 1233847W | Mathison Peak | |
| Ralph Leggett Place | Mendocino | pop place | 395133N | 1232404W | Iron Peak | |
| Ram Spring | Mendocino | spring | 395544N | 1231911W | Mina | |
| Ram Spring Creek | Mendocino | stream | 395613N | 1232043W | Mina | |
| Ramon Creek | Mendocino | stream | 391618N | 1233010W | Comptche | |
| Ramsey | Mendocino | pop place | 395821N | 1232646W | 618 | Updegraff Ridge |
| Ramsey Ridge | Mendocino | ridge | 392816N | 1233935W | Noyo Hill | |
| Ranch Primero | Mendocino | locale | 394431N | 1233047W | Cahto Peak | |
| Rancheria Creek | Mendocino | stream | 390313N | 1232621W | Philo | |
| Rancho Del Sanel | Mendocino | locale | 385804N | 1230355W | Hopland | |
| Rankin (historical) | Mendocino | pop place | 385550N | 1230704W | Hopland | |
| Rattlesnake Creek | Mendocino | stream | 394924N | 1233919W | Leggett | |
| Rattlesnake Creek | Mendocino | stream | 395824N | 1230319W | Leech Lake Mountain | |
| Rattlesnake Spring | Mendocino | spring | 394244N | 1231049W | Jamison Ridge | |
| Rattlesnake Summit | Mendocino | summit | 394708N | 1233249W | Tan Oak Park | |
| Rawles Canyon | Mendocino | valley | 385858N | 1232503W | Zeni Ridge | |
| Ray Gulch | Mendocino | valley | 391012N | 1233940W | Elk | |
| Ray Meadow | Mendocino | flat | 395244N | 1234345W | Noble Butte | |
| Ray Spring | Mendocino | spring | 395350N | 1231055W | Bluenose Ridge | |
| Rays Resort | Mendocino | locale | 390327N | 1232701W | Philo | |
| Rector Ranch | Mendocino | locale | 385716N | 1231948W | Ornbaun Valley | |
| Red Hill Gulch | Mendocino | valley | 390715N | 1232743W | Philo | |
| Red Mountain | Mendocino | summit | 390355N | 1230524W | Purdys Gardens | |
| Red Mountain | Mendocino | summit | 395450N | 1233934W | Noble Butte | |
| Red Mountain Creek | Mendocino | stream | 395540N | 1234543W | Piercy | |
| Red Rock | Mendocino | summit | 385429N | 1225746W | Highland Springs | |
| Red Rock | Mendocino | summit | 395615N | 1230655W | Leech Lake Mountain | |
| Red Rock | Mendocino | summit | 393409N | 1225507W | Hull Mountain | |
| Red Rock | Mendocino | summit | 394251N | 1230138W | Thatcher Ridge | |
| Red Rock Creek | Mendocino | stream | 394120N | 1230247W | Thatcher Ridge | |
| Red Rock Ridge | Mendocino | ridge | 393321N | 1225544W | Hull Mountain | |
| Redwine Cabin | Mendocino | locale | 395236N | 1233124W | Bell Springs | |
| Redwine Ranch | Mendocino | locale | 394832N | 1233025W | Tan Oak Park | |
| Redwine Spring | Mendocino | spring | 394352N | 1231418W | Jamison Ridge | |
| Redwood Campground | Mendocino | locale | 395231N | 1234338W | Noble Butte | |
| Redwood Creek | Mendocino | stream | 385449N | 1232107W | Ornbaun Valley | |
| Redwood Creek | Mendocino | stream | 392933N | 1233631W | Northspur | |
| Redwood Creek | Mendocino | stream | 394644N | 1234507W | Hales Grove | |
| Redwood Creek | Mendocino | stream | 391206N | 1232956W | Bailey Ridge | |
| Redwood Creek | Mendocino | stream | 392553N | 1232935W | Burbeck | |
| Redwood Creek | Mendocino | stream | 394050N | 1233922W | Lincoln Ridge | |
| Redwood Lodge | Mendocino | pop place | 392628N | 1234122W | Noyo Hill | |
| Redwood Valley | Mendocino | pop place | 391556N | 1231212W | 708 | Redwood Valley |
| Redwood Valley | Mendocino | valley | 391603N | 1231218W | Redwood Valley | |
| Redwood Valley Post Office | Mendocino | post office | 391554N | 1231211W | Redwood Valley | |
| Redwood Valley Rancheria | Mendocino | locale | 391704N | 1231247W | Redwood Valley | |
| Reep Ranch | Mendocino | locale | 391842N | 1234358W | Mathison Peak | |
| Reeves Canyon | Mendocino | valley | 393041N | 1232308W | Longvale | |
| Reeves Place | Mendocino | pop place | 395321N | 1230645W | Leech Lake Mountain | |
| Regina Heights | Mendocino | pop place | 390854N | 1231021W | Ukiah | |
| Reilly Heights | Mendocino | pop place | 390635N | 1233053W | Cold Spring | |
| Reilly Heights Guest Ranch | Mendocino | locale | 390636N | 1233017W | Cold Spring | |
| Reimert Ranch | Mendocino | locale | 385010N | 1233351W | Gualala | |
| Reservation School (historical) | Mendocino | school | 394849N | 1231452W | Covelo East | |
| Reyes Place | Mendocino | pop place | 395046N | 1232424W | Iron Peak | |
| Reynolds (historical) | Mendocino | pop place | 395640N | 1234642W | Piercy |
Section: 18 of 23
| Feature Name | County | Type | Latitude | Longitude | Alt | USGS 7.5' Map |
| Reynolds State Wayside Campground | Mendocino | park | 395616N | 1234713W | Piercy | |
| Rice Creek | Mendocino | stream | 391745N | 1232406W | Greenough Ridge | |
| Rice Ranch | Mendocino | locale | 395805N | 1234529W | Piercy | |
| Rickabaugh Glades | Mendocino | flat | 390249N | 1230326W | Purdys Gardens | |
| Rickard Ranch | Mendocino | locale | 385022N | 1232236W | McGuire Ridge | |
| Rickards Ranch | Mendocino | locale | 392254N | 1231940W | Willits | |
| Rider Creek | Mendocino | stream | 393848N | 1234617W | Westport | |
| Rider Gulch | Mendocino | valley | 393847N | 1234616W | Westport | |
| Ridge | Mendocino | pop place | 392012N | 1231800W | 1900 | Laughlin Range |
| Ridgewood 382 Dam | Mendocino | dam | 391918N | 1232024W | Laughlin Range | |
| Ridgewood Park | Mendocino | pop place | 391951N | 1232025W | Laughlin Range | |
| Ridgewood Ranch | Mendocino | locale | 391901N | 1231830W | Laughlin Range | |
| Riley Ridge | Mendocino | ridge | 390041N | 1230317W | Purdys Gardens | |
| Riley Ridge | Mendocino | ridge | 392514N | 1233833W | Noyo Hill | |
| Riley Valley | Mendocino | stream | 390128N | 1230216W | Purdys Gardens | |
| Riser Ranch | Mendocino | locale | 384730N | 1233138W | Gualala | |
| River Garden | Mendocino | area | 395042N | 1232505W | Iron Peak | |
| River Garden (historical) | Mendocino | pop place | 395043N | 1232509W | Iron Peak | |
| Riverdale | Mendocino | pop place | 395316N | 1234447W | Noble Butte | |
| Robinson Creek | Mendocino | stream | 384841N | 1232854W | McGuire Ridge | |
| Robinson Creek | Mendocino | stream | 390606N | 1231055W | Elledge Peak | |
| Robinson Creek | Mendocino | stream | 385053N | 1232432W | McGuire Ridge | |
| Robinson Creek | Mendocino | stream | 390035N | 1232206W | Boonville | |
| Robinson Gulch | Mendocino | valley | ? ? ? ? ? | ? ? ? ? ? | ? ? ? ? ? | |
| Robinson Point | Mendocino | cape | 384620N | 1233223W | Gualala | |
| Robinson Reef | Mendocino | bar | 384602N | 1233223W | Gualala | |
| Rock Creek | Mendocino | stream | 393941N | 1232036W | Dos Rios | |
| Rock Creek | Mendocino | stream | 393941N | 1232036W | Dos Rios | |
| Rock Creek | Mendocino | stream | 395623N | 1233109W | Bell Springs | |
| Rock Creek | Mendocino | stream | 394054N | 1234517W | Westport | |
| Rock Creek | Mendocino | stream | 394056N | 1233906W | Lincoln Ridge | |
| Rock Creek | Mendocino | stream | 395227N | 1234319W | Leggett | |
| Rock Creek Campground | Mendocino | locale | 395238N | 1234326W | Noble Butte | |
| Rockpile Peak | Mendocino | summit | 384907N | 1232124W | Gube Mountain | |
| Rockport | Mendocino | pop place | 394420N | 1234854W | 30 | Westport |
| Rockport Bay | Mendocino | bay | 394403N | 1234939W | Westport | |
| Rockport Creek | Mendocino | stream | 394411N | 1234840W | Westport | |
| Rockport Fire Station | Mendocino | locale | 394320N | 1234845W | Westport | |
| Rocktree Creek | Mendocino | stream | 392724N | 1231440W | Foster Mountain | |
| Rocktree Valley | Mendocino | basin | 392714N | 1231839W | Willits | |
| Rocky Basin Creek | Mendocino | stream | 393939N | 1225426W | Plaskett Ridge | |
| Rocky Creek | Mendocino | stream | 392258N | 1230537W | Van Arsdale Reservoir | |
| Rocky Creek | Mendocino | stream | 391905N | 1231321W | Redwood Valley | |
| Rocky Gulch | Mendocino | valley | 392002N | 1234203W | Mathison Peak | |
| Rocky Point | Mendocino | summit | 392853N | 1230559W | Van Arsdale Reservoir | |
| Rocky Ridge | Mendocino | ridge | 390705N | 1231908W | Boonville | |
| Rodeo Creek | Mendocino | stream | 393902N | 1232036W | Dos Rios | |
| Rodeo Valley | Mendocino | basin | 393849N | 1231902W | Dos Rios | |
| Roller Gulch | Mendocino | valley | 391022N | 1233908W | Elk | |
| Rolling Brook | Mendocino | stream | 385302N | 1233515W | Eureka Hill | |
| Rose Creek | Mendocino | stream | 390825N | 1232230W | Bailey Ridge | |
| Rose Creek | Mendocino | stream | 395002N | 1230359W | Newhouse Ridge | |
| Rose Rock | Mendocino | summit | 394201N | 1230014W | Thatcher Ridge | |
| Roseman Creek | Mendocino | stream | 384933N | 1233631W | Gualala | |
| Ross Creek | Mendocino | stream | 385238N | 1233959W | Point Arena | |
| Round Mountain | Mendocino | summit | 394246N | 1231236W | Jamison Ridge | |
| Round Mountain 1382 Dam | Mendocino | dam | 391242N | 1231342W | Ukiah | |
| Round Valley | Mendocino | basin | 394647N | 1231336W | Covelo East | |
| Round Valley Airport | Mendocino | airport | 394724N | 1231559W | Covelo West | |
| Round Valley Indian Reservation | Mendocino | reserve | 395430N | 1231910W | Mina | |
| Rowes (historical) | Mendocino | pop place | 392851N | 1232421W | Burbeck | |
| Rowes Creek | Mendocino | stream | 392906N | 1232330W | Burbeck | |
| Royale Redwoods Ranch | Mendocino | locale | 391316N | 1233025W | Navarro | |
| Ruddick Ranch | Mendocino | locale | 390221N | 1230721W | Purdys Gardens | |
| Rush Bottom | Mendocino | flat | 385834N | 1231800W | Ornbaun Valley | |
| Russ Gulch | Mendocino | valley | 391150N | 1233612W | Navarro | |
| Russel Ranch | Mendocino | locale | 391608N | 1233402W | Comptche | |
| Russell Brook | Mendocino | stream | 391833N | 1232956W | Greenough Ridge | |
| Russian Gulch | Mendocino | valley | 390353N | 1233206W | Cold Spring | |
| Russian Gulch | Mendocino | valley | 391945N | 1234817W | Mendocino | |
| Russian Gulch State Park | Mendocino | park | 391959N | 1234626W | Mendocino | |
| Russian River Reservoir | Mendocino | reservoir | 391200N | 1231054W | Ukiah | |
| Ryan Creek | Mendocino | stream | 392835N | 1232247W | Burbeck | |
| Saddle Opening | Mendocino | flat | 385512N | 1232446W | Zeni Ridge | |
| Saddle Point | Mendocino | cape | 391035N | 1234506W | Albion | |
| Saddle Spring | Mendocino | spring | 385551N | 1230847W | Yorkville | |
| Sage (historical) | Mendocino | pop place | ? ? ? ? ? | ? ? ? ? ? | ? ? ? ? ? | |
| Sagehorn Creek | Mendocino | stream | 392838N | 1231309W | Foster Mountain | |
| Sail Rock | Mendocino | island | 384952N | 1233802W | Saunders Reef | |
| Sail Rock | Mendocino | island | 384928N | 1233641W | Gualala | |
| Sail Rock Ranch | Mendocino | locale | 385013N | 1233732W | Saunders Reef | |
| Saint Anthonys Point | Mendocino | cape | 390810N | 1234318W | Elk | |
| Saint Francis Ranch | Mendocino | locale | 392600N | 1232215W | Willits | |
| Saint John Canyon | Mendocino | valley | 390531N | 1232239W | Philo | |
| Saint John Ranch (historical) | Mendocino | locale | 392450N | 1231645W | Willits | |
| Saint Louis Ranch | Mendocino | locale | 393120N | 1231853W | Willis Ridge | |
| Saint Orres Creek | Mendocino | stream | 384733N | 1233347W | Gualala | |
| Saint Orres Gulch | Mendocino | valley | 384733N | 1233343W | Gualala | |
| Sallady Creek | Mendocino | stream | 394641N | 1230055W | Newhouse Ridge | |
| Sallady Ridge | Mendocino | ridge | 394424N | 1230053W | Thatcher Ridge | |
| Sally Bell Grove | Mendocino | woods | 395215N | 1235317W | Mistake Point | |
| Salmon Creek | Mendocino | stream | 392339N | 1230657W | Van Arsdale Reservoir | |
| Salmon Creek | Mendocino | stream | 394154N | 1231018W | Jamison Ridge | |
| Salmon Creek | Mendocino | stream | 392506N | 1231039W | Foster Mountain | |
| Salmon Creek | Mendocino | stream | 394200N | 1225525W | Plaskett Ridge | |
| Salmon Point | Mendocino | cape | 391250N | 1234629W | Albion | |
| Salt Canyon | Mendocino | valley | 385532N | 1230231W | Hopland | |
| Salt Creek | Mendocino | stream | 392935N | 1231253W | Foster Mountain | |
| Salt Creek | Mendocino | stream | 394153N | 1231605W | Dos Rios | |
| Salt Creek Divide | Mendocino | gap | 393948N | 1231230W | Jamison Ridge |
Section: 19 of 23
| Feature Name | County | Type | Latitude | Longitude | Alt | USGS 7.5' Map |
| Salt Flat | Mendocino | flat | 393717N | 1231354W | Brushy Mountain | |
| Salt Hollow Creek | Mendocino | stream | 391512N | 1231211W | Redwood Valley | |
| Salt Rock Camp | Mendocino | locale | 395517N | 1230832W | Bluenose Ridge | |
| Salt Spring Creek | Mendocino | stream | 385411N | 1230108W | Hopland | |
| Sam Watt Creek | Mendocino | stream | 393342N | 1232553W | Longvale | |
| Sam Watt Rock | Mendocino | summit | 393350N | 1232633W | Longvale | |
| Sanal | Mendocino | locale | 385804N | 1230355W | Hopland | |
| Sand Bank Creek | Mendocino | stream | 394213N | 1231703W | Dos Rios | |
| Sand Banks | Mendocino | slope | 394339N | 1231806W | Dos Rios | |
| Sand Rock | Mendocino | summit | 394343N | 1233351W | Cahto Peak | |
| Sandhill Lake | Mendocino | lake | 393055N | 1234627W | Inglenook | |
| Sanel | Mendocino | civil | 385950N | 1230720W | Hopland | |
| Sanel Mountain | Mendocino | summit | 385653N | 1231254W | Yorkville | |
| Sanel Valley | Mendocino | valley | 385912N | 1230619W | Hopland | |
| Sanhedrin Lookout | Mendocino | locale | 393058N | 1230541W | Sanhedrin Mountain | |
| Sanhedrin Mountain | Mendocino | summit | 393039N | 1230520W | Sanhedrin Mountain | |
| Sartori Gulch | Mendocino | valley | 390851N | 1234359W | Elk | |
| Saunders Landing | Mendocino | locale | 385104N | 1233853W | Saunders Reef | |
| Saunders Reef | Mendocino | bar | 385110N | 1233933W | Saunders Reef | |
| Saunders Reef | Mendocino | bar | 385234N | 1233950W | Point Arena | |
| Sawyer Creek | Mendocino | stream | 391212N | 1232840W | Bailey Ridge | |
| School Marm Grove | Mendocino | woods | 395324N | 1235453W | Bear Harbor | |
| School Section Creek | Mendocino | stream | 395539N | 1233735W | Noble Butte | |
| Schoolhouse Creek | Mendocino | stream | 391541N | 1234709W | Mendocino | |
| Schooner Gulch | Mendocino | valley | 385201N | 1233911W | Saunders Reef | |
| Schooner Gulch State Beach | Mendocino | park | 385205N | 1233915W | Saunders Reef | |
| Scott Creek | Mendocino | stream | 392530N | 1231234W | Foster Mountain | |
| Scott Ranch | Mendocino | locale | 390753N | 1232842W | Bailey Ridge | |
| Scout Lake 389 Dam | Mendocino | dam | 392454N | 1231654W | Willits | |
| Sea Lion Rock | Mendocino | island | 394535N | 1235022W | Hales Grove | |
| Sea Lion Rock | Mendocino | pillar | 394427N | 1234958W | Westport | |
| Sea Lion Rocks | Mendocino | island | 385609N | 1234345W | Point Arena | |
| Seal Rocks | Mendocino | island | 395408N | 1235533W | Bear Harbor | |
| Seal Rocks | Mendocino | island | 392929N | 1234812W | Fort Bragg | |
| Seaside Creek | Mendocino | stream | 393335N | 1234552W | Inglenook | |
| Seaside Creek Beach | Mendocino | beach | 393333N | 1234555W | Inglenook | |
| Sebbas Creek | Mendocino | stream | 395802N | 1235245W | Bear Harbor | |
| Section Four Creek | Mendocino | stream | 393727N | 1233242W | Sherwood Peak | |
| Seward Creek | Mendocino | stream | 391535N | 1231353W | Redwood Valley | |
| Shady Dell | Mendocino | valley | 394955N | 1235040W | Hales Grove | |
| Shake Cabin Flat | Mendocino | flat | 394757N | 1230228W | Newhouse Ridge | |
| Shake City | Mendocino | pop place | 392552N | 1232758W | 540 | Burbeck |
| Shake Creek | Mendocino | stream | 393619N | 1230648W | Sanhedrin Mountain | |
| Shearing Creek | Mendocino | stream | 385633N | 1231852W | Ornbaun Valley | |
| Sheep Trail | Mendocino | trail | 391341N | 1233101W | Navarro | |
| Sheldon Creek | Mendocino | stream | 385642N | 1230028W | Hopland | |
| Sheldon Ranch (historical) | Mendocino | locale | 385620N | 1225817W | Highland Springs | |
| Shell Creek | Mendocino | stream | 395145N | 1232605W | Iron Peak | |
| Shell Peak | Mendocino | summit | 391127N | 1230336W | Cow Mountain | |
| Shell Rock | Mendocino | summit | 395042N | 1232923W | Iron Peak | |
| Shell Rock Creek | Mendocino | stream | 395123N | 1232558W | Iron Peak | |
| Shelving Rock Creek | Mendocino | stream | 393017N | 1231935W | Willis Ridge | |
| Sherburns (historical) | Mendocino | pop place | 394934N | 1230458W | Newhouse Ridge | |
| Sherman Gulch | Mendocino | valley | 390605N | 1232244W | Philo | |
| Sherman Ridge | Mendocino | ridge | 390608N | 1232137W | Boonville | |
| Sherwood Creek | Mendocino | stream | 392852N | 1232310W | Burbeck | |
| Sherwood Peak | Mendocino | summit | 393045N | 1233037W | Sherwood Peak | |
| Sherwood Rancheria | Mendocino | locale | 393223N | 1232912W | Longvale | |
| Sherwood Ridge | Mendocino | ridge | 393024N | 1233151W | Sherwood Peak | |
| Sherwood Valley | Mendocino | valley | 393141N | 1232715W | Longvale | |
| Sheubeck Ranch (historical) | Mendocino | locale | 395720N | 1232217W | Mina | |
| Shiegho (historical) | Mendocino | pop place | ? ? ? ? ? | ? ? ? ? ? | Hopland | |
| Shields Cemetery | Mendocino | cemetery | 390516N | 1232810W | Philo | |
| Shields Creek | Mendocino | stream | 394819N | 1230339W | Newhouse Ridge | |
| Shimmin Ridge | Mendocino | ridge | 393516N | 1232210W | Willis Ridge | |
| Shingle Mill Creek | Mendocino | stream | 390935N | 1232526W | Bailey Ridge | |
| Shinglemill Gulch | Mendocino | valley | 385204N | 1233742W | Saunders Reef | |
| Sho-Da-Kai | Mendocino | island | 391158N | 1231044W | Ukiah | |
| Shoemake Opening | Mendocino | gap | 390446N | 1231734W | Boonville | |
| Shoreline Rock | Mendocino | island | 394917N | 1235050W | Hales Grove | |
| Short Creek | Mendocino | stream | 394719N | 1231232W | Covelo East | |
| Short Ridge | Mendocino | ridge | 390340N | 1230420W | Purdys Gardens | |
| Short Ridge | Mendocino | ridge | 394518N | 1230248W | Newhouse Ridge | |
| Signal Creek | Mendocino | stream | 385242N | 1233003W | Eureka Hill | |
| Signal Peak | Mendocino | summit | 394212N | 1233445W | Cahto Peak | |
| Signal Port (historical) | Mendocino | pop place | 384945N | 1233652W | Gualala | |
| Signal Port Creek | Mendocino | stream | 384943N | 1233654W | Gualala | |
| Signal Ridge | Mendocino | ridge | 385143N | 1232556W | McGuire Ridge | |
| Signal School (historical) | Mendocino | school | 390437N | 1233107W | Cold Spring | |
| Silver Creek | Mendocino | stream | 394830N | 1230820W | Covelo East | |
| Simerson | Mendocino | pop place | 392516N | 1232114W | Willits | |
| Simmerley Flat | Mendocino | flat | 394752N | 1230946W | Covelo East | |
| Simmerly Creek | Mendocino | stream | 394140N | 1231014W | Jamison Ridge | |
| Sindel Gulch | Mendocino | valley | 392144N | 1233027W | Comptche | |
| Sinkyone Wilderness State Park | Mendocino | park | 395523N | 1235632W | Bear Harbor | |
| Skid Gulch | Mendocino | valley | 390716N | 1233357W | Cold Spring | |
| Skidmore Ridge | Mendocino | ridge | 393818N | 1225525W | Plaskett Ridge | |
| Skunk Creek | Mendocino | stream | 390650N | 1231622W | Boonville | |
| Skunk Flat | Mendocino | flat | 394711N | 1232045W | Covelo West | |
| Skunk Lake | Mendocino | lake | 394247N | 1230240W | Thatcher Ridge | |
| Skunk Lake Creek | Mendocino | stream | 394119N | 1230248W | Thatcher Ridge | |
| Skunk Rock | Mendocino | summit | 394310N | 1230250W | Thatcher Ridge | |
| Slaughterhouse Gulch | Mendocino | valley | 391855N | 1234758W | Mendocino | |
| Slaughterhouse Gulch | Mendocino | valley | 394440N | 1234759W | Westport | |
| Sled Creek | Mendocino | stream | 385425N | 1231846W | Ornbaun Valley | |
| Slick Rock Creek | Mendocino | stream | 385012N | 1233739W | Saunders Reef | |
| Small White Rock | Mendocino | bar | 395847N | 1240003W | Bear Harbor OE W | |
| Smith Creek | Mendocino | stream | 391430N | 1234628W | Albion | |
| Smith Creek | Mendocino | stream | 393132N | 1234345W | Dutchmans Knoll | |
| Smith Ranch | Mendocino | locale | 385225N | 1233437W | Gualala |
Section: 20 of 23
| Feature Name | County | Type | Latitude | Longitude | Alt | USGS 7.5' Map |
| Smith Ridge | Mendocino | ridge | 393137N | 1233500W | Sherwood Peak | |
| Smithe Redwoods State Reserve | Mendocino | park | 395400N | 1234439W | Noble Butte | |
| Smokehouse Creek | Mendocino | stream | 395621N | 1225824W | Buck Rock | |
| Smokehouse Ridge | Mendocino | ridge | 395832N | 1225818W | Buck Rock | |
| Snook Mountain | Mendocino | summit | 385039N | 1231922W | Gube Mountain | |
| Snow Mountain | Mendocino | summit | 385614N | 1231156W | Yorkville | |
| Snuffins Creek | Mendocino | stream | 391038N | 1232339W | Bailey Ridge | |
| Soda Basin | Mendocino | basin | 392507N | 1232753W | Burbeck | |
| Soda Creek | Mendocino | stream | 390016N | 1232103W | Boonville | |
| Soda Creek | Mendocino | stream | 390912N | 1232221W | Orrs Springs | |
| Soda Creek | Mendocino | stream | 390935N | 1233358W | Navarro | |
| Soda Creek | Mendocino | stream | 391249N | 1232624W | Bailey Ridge | |
| Soda Creek | Mendocino | stream | 392841N | 1232858W | Burbeck | |
| Soda Fork | Mendocino | stream | 390142N | 1233354W | Cold Spring | |
| Soda Gulch | Mendocino | valley | 390922N | 1234002W | Elk | |
| Soda Spring | Mendocino | spring | 390124N | 1231851W | Boonville | |
| Soda Spring | Mendocino | spring | 390142N | 1233354W | Cold Spring | |
| Soda Spring | Mendocino | spring | 391702N | 1233626W | Comptche | |
| Soda Spring | Mendocino | spring | 392325N | 1230945W | Foster Mountain | |
| Soda Spring Creek | Mendocino | stream | 391658N | 1233623W | Comptche | |
| Soda Spring Creek | Mendocino | stream | 391658N | 1233623W | Comptche | |
| Soda Spring Creek | Mendocino | stream | 384951N | 1231000W | Big Foot Mountain | |
| Soda Spring Gulch | Mendocino | valley | 391406N | 1233832W | Elk | |
| Soda Springs | Mendocino | pop place | 390127N | 1231853W | Boonville | |
| Soda Springs | Mendocino | pop place | 392522N | 1232559W | Burbeck | |
| Soldier Creek | Mendocino | stream | 395055N | 1234948W | Hales Grove | |
| Soldier Frank Hill | Mendocino | summit | 394538N | 1234953W | Hales Grove | |
| Soldier Frank Point | Mendocino | cape | 394526N | 1235013W | Hales Grove | |
| Soldier Point | Mendocino | cape | 392622N | 1234906W | Fort Bragg | |
| Soudan Ranch | Mendocino | locale | 392615N | 1231429W | Foster Mountain | |
| South Branch North Fork Navarro River | Mendocino | stream | 391018N | 1233332W | Navarro | |
| South Branch Robinson Creek | Mendocino | stream | 390518N | 1231506W | Boonville | |
| South Branch Who Who Creek | Mendocino | stream | 395453N | 1231548W | Mina | |
| South Fork | Mendocino | pop place | 392534N | 1234334W | 40 | Noyo Hill |
| South Fork Albion River | Mendocino | stream | 391513N | 1234026W | Mathison Peak | |
| South Fork Bear Haven Creek | Mendocino | stream | 393339N | 1234011W | Dutchmans Knoll | |
| South Fork Big River | Mendocino | stream | 391743N | 1233158W | Comptche | |
| South Fork Brush Creek | Mendocino | stream | 385804N | 1233419W | Eureka Hill | |
| South Fork Camp | Mendocino | locale | 391800N | 1233300W | Comptche | |
| South Fork Cottaneva Creek | Mendocino | stream | 394420N | 1234902W | Westport | |
| South Fork Garcia River | Mendocino | stream | 385123N | 1233343W | Gualala | |
| South Fork Greenwood Creek | Mendocino | stream | 390345N | 1233222W | Cold Spring | |
| South Fork Hardy Creek | Mendocino | stream | 394321N | 1234651W | Westport | |
| South Fork Hare Creek | Mendocino | stream | 392319N | 1234408W | Noyo Hill | |
| South Fork Juan Creek | Mendocino | stream | 394241N | 1234434W | Lincoln Ridge | |
| South Fork Minnie Creek | Mendocino | stream | 385830N | 1232704W | Zeni Ridge | |
| South Fork Mule Creek | Mendocino | stream | 394902N | 1234626W | Hales Grove | |
| South Fork Noyo River | Mendocino | stream | 392527N | 1234336W | Noyo Hill | |
| South Fork Redwood Creek | Mendocino | stream | 394626N | 1234524W | Hales Grove | |
| South Fork Ten Mile River | Mendocino | stream | 393225N | 1234440W | Dutchmans Knoll | |
| South Fork Usal Creek | Mendocino | stream | 395030N | 1234943W | Hales Grove | |
| South Fork Wages Creek | Mendocino | stream | 393755N | 1234114W | Lincoln Ridge | |
| South Leggett | Mendocino | pop place | 395055N | 1234223W | Leggett | |
| South Ridge | Mendocino | ridge | 390553N | 1232031W | Boonville | |
| Spanish Creek | Mendocino | stream | 385823N | 1234033W | Point Arena | |
| Spencer Ranch | Mendocino | locale | 394753N | 1230815W | Covelo East | |
| Split Rock | Mendocino | cliff | 395620N | 1232220W | Mina | |
| Spooner Creek | Mendocino | stream | 391230N | 1232819W | Bailey Ridge | |
| Sportsman Glade | Mendocino | flat | 393137N | 1230140W | Sanhedrin Mountain | |
| Spring Creek | Mendocino | stream | 394603N | 1233233W | Tan Oak Park | |
| Spruce Grove Campground | Mendocino | locale | 393458N | 1225604W | Hull Mountain | |
| Spyrock | Mendocino | pop place | 395236N | 1232634W | 821 | Updegraff Ridge |
| Spyrock | Mendocino | summit | 395155N | 1232609W | Iron Peak | |
| Squaw Creek | Mendocino | stream | 394949N | 1233846W | Leggett | |
| Squaw Opening | Mendocino | flat | 391235N | 1232526W | Bailey Ridge | |
| Squaw Rock | Mendocino | summit | 385210N | 1232505W | McGuire Ridge | |
| Squaw Rock | Mendocino | summit | 385445N | 1230318W | Hopland | |
| Squaw Rock Slide | Mendocino | slope | 385445N | 1230252W | Hopland | |
| Stambaugh Ranch | Mendocino | locale | 390556N | 1231554W | Boonville | |
| Standish-Hickey State Recreation Area | Mendocino | park | 395246N | 1234414W | Noble Butte | |
| Standley Creek | Mendocino | stream | 395736N | 1234806W | Piercy | |
| Stanley Creek | Mendocino | stream | 393516N | 1233237W | Sherwood Peak | |
| Stansbury Spring | Mendocino | spring | 385615N | 1232845W | Zeni Ridge | |
| Stapp Creek | Mendocino | stream | 394356N | 1233040W | Cahto Peak | |
| Staramella Ranch | Mendocino | locale | 385842N | 1234025W | Point Arena | |
| Steel Bench | Mendocino | bench | 395421N | 1230139W | Leech Lake Mountain | |
| Steens Landing | Mendocino | locale | 384942N | 1233704W | Gualala | |
| Steep Gulch | Mendocino | valley | 394541N | 1233225W | Tan Oak Park | |
| Stemple Ranch | Mendocino | locale | 393055N | 1232549W | Longvale | |
| Stetson Ranch (historical) | Mendocino | locale | 391638N | 1230058W | Potter Valley | |
| Stewart Creek | Mendocino | stream | 384903N | 1232520W | McGuire Ridge | |
| Stick Lake | Mendocino | lake | 395609N | 1230501W | Leech Lake Mountain | |
| Stick Lake Canyon | Mendocino | valley | 395841N | 1230457W | Leech Lake Mountain | |
| Stillwell Point | Mendocino | cape | 391513N | 1234705W | Mendocino | |
| Stoner Creek | Mendocino | stream | 394541N | 1232251W | Iron Peak | |
| Stoney Creek | Mendocino | stream | 394503N | 1232243W | Iron Peak | |
| Stoten Opening | Mendocino | flat | 394202N | 1233431W | Cahto Peak | |
| Strauss Orchard | Mendocino | locale | 393754N | 1234430W | Lincoln Ridge | |
| Streamside Camp | Mendocino | locale | 395647N | 1235758W | Bear Harbor | |
| Streeter Creek | Mendocino | stream | 394445N | 1233140W | Cahto Peak | |
| String Creek | Mendocino | stream | 392753N | 1231622W | Willits | |
| Stronetta | Mendocino | pop place | 385650N | 1234205W | Point Arena | |
| Strong Mountain | Mendocino | summit | 393357N | 1233051W | Sherwood Peak | |
| Sugarloaf | Mendocino | summit | 385854N | 1232845W | Zeni Ridge | |
| Sulphur Creek | Mendocino | stream | 390936N | 1231116W | Ukiah | |
| Sulphur Fork | Mendocino | stream | 390213N | 1233441W | Cold Spring | |
| Summer Camp | Mendocino | locale | 393350N | 1231024W | Brushy Mountain | |
| Summer Lake | Mendocino | reservoir | 392554N | 1232242W | Burbeck | |
| Summit | Mendocino | locale | 392410N | 1232456W | Burbeck | |
| Summit Spring | Mendocino | spring | 385822N | 1232832W | Zeni Ridge |
Copyright © Calsign 2001