Alpine County Rivers
Name (# of Reports) Last Update Location
East Carson River (CA) [ESFR] (288) 12-17-2025 Markleeville, CA
Stanislaus River - Clarks Fork - Alpine County (3) 10-6-2023 Alpine County, CA
West Carson River (CA) [ESFR] (241) 12-17-2025 Woodfords, CA
 

Amador County Rivers
Name (# of Reports) Last Update Location
Mokelumne River (1) 11-8-2018 CA
 

Butte County Rivers
Name (# of Reports) Last Update Location
Feather River (384) 10-16-2025 Oroville, CA
Feather River - North Fork (7) 3-29-2022 Oroville, CA
 

Calaveras County Rivers
Name (# of Reports) Last Update Location
Calaveras River (3) 3-22-2021 CA
Stanislaus River - North Fork (53) 11-16-2025 Bear Valley, CA
 

Colusa County Rivers
Name (# of Reports) Last Update Location
Sacramento River - Colusa (22) 5-1-2025 Colusa, CA
Sacramento River - Grimes (2) 2-4-2022 Grimes, CA
 

Contra Costa County Rivers
Name (# of Reports) Last Update Location
San Joaquin River - Oakley (26) 5-27-2024 Oakley
San Joaquin River- Antioch (8) 5-24-2022 Antioch, CA
 

Del Norte County Rivers
Name (# of Reports) Last Update Location
Smith River (400) 12-11-2025 Smith River, CA
Winchuck River (32) 3-26-2025 OR
 

El Dorado County Rivers
Name (# of Reports) Last Update Location
American River (136) 6-25-2020 Sacramento, CA
American River - Silver Fork (1) 10-3-2016 Kyburz, CA
 

Fresno County Rivers
Name (# of Reports) Last Update Location
San Joaquin River (243) 8-13-2023 Stockton, CA
San Joaquin River - South Fork (1) 12-22-2016 Fresno County, CA
 

Humboldt County Rivers
Name (# of Reports) Last Update Location
Eel River (286) 12-11-2025 Fortuna, CA
Eel River - South Fork (132) 12-11-2025 CA
Klamath River - Lower (128) 10-9-2025 Klamath, CA
Mad River (226) 12-11-2025 Arcata, CA
Mattole River (2) 10-18-2024 Patrolia, CA
Trinity River (688) 12-3-2025 Douglas City, CA
Van Duzen River (174) 12-11-2025 Bridgeville, CA
 

Lake County Rivers
Name (# of Reports) Last Update Location
Eel River (286) 12-11-2025 Fortuna, CA
 

Lassen County Rivers
Name (# of Reports) Last Update Location
Susan River - Lower (1) 4-17-2017 Susanville, CA
 

Madera County Rivers
Name (# of Reports) Last Update Location
San Joaquin River (243) 8-13-2023 Stockton, CA
San Joaquin River-Middle Fork [ESFR] (26) 10-11-2024 Mammoth Lakes, CA
 

Mariposa County Rivers
Name (# of Reports) Last Update Location
Merced River (1) 6-6-2018 CA
Merced River - South Fork - Hite Cove (1) 4-11-2017 Mariposa County, CA
 

Mendocino County Rivers
Name (# of Reports) Last Update Location
Eel River (286) 12-11-2025 Fortuna, CA
Eel River - South Fork (132) 12-11-2025 CA
Gualala River (45) 4-15-2022  
Russian River (189) 12-7-2024 Guerneville, CA
Russian River - East Branch (2) 7-9-2018 Redwood Valley, CA
 

Merced County Rivers
Name (# of Reports) Last Update Location
Merced River (1) 6-6-2018 CA
 

Modoc County Rivers
Name (# of Reports) Last Update Location
Klamath River - Middle (153) 9-16-2025  
Lost River (44) 12-10-2025 Bonanza, OR
Pit River (379) 11-13-2025 CA
 

Mono County Rivers
Name (# of Reports) Last Update Location
East Walker River [ESFR] (26) 8-10-2025  
East Walker River (CA) [ESFR] (1472) 11-9-2025 Bridgeport, CA
Little Walker River [ESFR] (3) 6-18-2022 Sonora Pass, CA
Owens River [ESFR] (814) 8-8-2024 CA
Owens River - Section 3 - Upper (above Crowley) [ESFR] (334) 12-3-2025 Eastern Sierra, CA
West Walker River (CA) [ESFR] (305) 11-16-2025 Walker, CA
West Walker River (Section 2) [ESFR] (183) 4-10-2016 Walker, CA
 

Monterey County Rivers
Name (# of Reports) Last Update Location
Carmel River (3) 10-24-2022 Carmel, CA
 

Napa County Rivers
Name (# of Reports) Last Update Location
Napa River (50) 3-17-2016 Napa, CA
 

Nevada County Rivers
Name (# of Reports) Last Update Location
Truckee River (1399) 12-12-2025  
Truckee River- Hirschdale (5) 1-19-2023 Truckee, CA
 

Placer County Rivers
Name (# of Reports) Last Update Location
Truckee River (1399) 12-12-2025  
 

Plumas County Rivers
Name (# of Reports) Last Update Location
Feather River - Middle Fork - Graeagle (15) 4-21-2025 Graeagle, CA
Feather River - North Fork (7) 3-29-2022 Oroville, CA
Feather River - North Fork - Belden (3) 12-7-2021 Bleden, CA
 

Sacramento County Rivers
Name (# of Reports) Last Update Location
American River - Nimbus Hatcery (2) 2-28-2018 Gold River, CA
Sacramento River (1423) 12-17-2025 CA
Sacramento River - Freeport (2) 7-25-2016 Freeport, CA
Sacramento River - Garcia Bend (4) 7-27-2024 Sacramento, CA
Sacramento River - Sacramento (11) 5-2-2025 Sacramento, CA
 

San Joaquin County Rivers
Name (# of Reports) Last Update Location
Mokelumne River (1) 11-8-2018 CA
Old River (3) 11-6-2021 Tracy, CA
San Joaquin River (243) 8-13-2023 Stockton, CA
San Joaquin River - Mokelumne Mouth (54) 5-17-2024 Isleton, CA
 

Santa Cruz County Rivers
Name (# of Reports) Last Update Location
San Lorenzo River (12) 3-13-2024 Santa Cruz, CA
 

Shasta County Rivers
Name (# of Reports) Last Update Location
Fall River (96) 11-18-2025 Fall River Mills, CA
Sacramento River (1423) 12-17-2025 CA
Sacramento River - Barge Hole (7) 5-13-2025 CA
Sacramento River - Lower (1296) 12-3-2025 Redding, CA
Sacramento River - Upper (75) 12-3-2025 Shasta, CA
 

Sierra County Rivers
Name (# of Reports) Last Update Location
Little Truckee River (391) 12-4-2025 CA
Truckee River (1399) 12-12-2025  
Yuba River - North Fork (3) 10-27-2025 Downieville, CA
 

Siskiyou County Rivers
Name (# of Reports) Last Update Location
Applegate River (188) 12-9-2025 Applegate, OR
Klamath River - Middle (153) 9-16-2025  
Klamath River - Upper - CA (835) 10-15-2025 Hornbrook, CA
Lost River (44) 12-10-2025 Bonanza, OR
McCloud River (341) 12-3-2025 CA
Sacramento River (1423) 12-17-2025 CA
Sacramento River - Upper (280) 11-12-2025 Siskiyou, CA
 

Solano County Rivers
Name (# of Reports) Last Update Location
Napa River (50) 3-17-2016 Napa, CA
Rancho Del Dios (1) 3-20-2007 CA
Sacramento River - Rio Vista (20) 4-16-2022 Rio Vista, CA
 

Sonoma County Rivers
Name (# of Reports) Last Update Location
Gualala River (45) 4-15-2022  
Russian River (189) 12-7-2024 Guerneville, CA
 

Stanislaus County Rivers
Name (# of Reports) Last Update Location
Stanislaus River (34) 2-19-2024 CA
 

Sutter County Rivers
Name (# of Reports) Last Update Location
Feather River (384) 10-16-2025 Oroville, CA
 

Tehama County Rivers
Name (# of Reports) Last Update Location
Sacramento River - Red Bluff (20) 5-20-2025 Red Bluff, CA
Sacramento River - Woodson Bridge (1) 8-12-2020 Corning, CA
 

Trinity County Rivers
Name (# of Reports) Last Update Location
Eel River (286) 12-11-2025 Fortuna, CA
Klamath River - Middle (153) 9-16-2025  
Mad River (226) 12-11-2025 Arcata, CA
Trinity River (688) 12-3-2025 Douglas City, CA
Trinity River - Above Clair Engle Lake (1) 6-22-2017 Whiskeytown Lake, CA
Trinity River - Stuart Fork (1) 3-6-2017 Trinity Lake, CA
Trinity River - Upper (42) 11-17-2025 Lewiston, CA
Van Duzen River (174) 12-11-2025 Bridgeville, CA
 

Tulare County Rivers
Name (# of Reports) Last Update Location
Kern River (221) 12-12-2025  
 

Tuolumne County Rivers
Name (# of Reports) Last Update Location
Stanislaus River (34) 2-19-2024 CA
Stanislaus River - Middle Fork (1) 11-12-2021 Tuolumne County, CA
Stanislaus River - North Fork (53) 11-16-2025 Bear Valley, CA
Tuolumne River (1) 3-12-2017 CA
Tuolumne River - North Fork (1) 11-29-2016 Tuolumne County, CA
 

Yuba County Rivers
Name (# of Reports) Last Update Location
Feather River (384) 10-16-2025 Oroville, CA
Yuba River - Upper (1) 3-13-2016 Donner Summit, CA