CDFW Upper Sacramento River Basin Salmonid Monitoring

What's New

A new interactive story map (updated in May 2021) is now available to explore the Upper Sacramento River Basin Stranding Locations. Each tab highlights a different complex of stranding pools with a photo and information in the left story panel including the number of fish saved. On the right is an interactive map showing the pool locations. Clicking on each pool shows additional information and a photo if available.

CDFW Upper Sacramento River Basin Salmonid Monitoring

The Upper Sacramento River Basin (USRB) contains much of California's salmon and steelhead populations. This page contains salmon and steelhead assessment project files consisting of long term data, annual reports, databases, spreadsheets and descriptions of monitoring efforts.

About
Data Access
Status and Source
Photos

Map Viewer
No - CDFW Upper Sacramento River Basin Salmonid data are not available through the Map Viewer.

CalFish Tabular Data
No - CDFW Upper Sacramento River Basin Salmonid Monitoring data are not available through the CalFish database query.

Image Gallery
Pictures taken in the Upper Sacramento River Basin are available for download.

CalFish Data Downloads


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2025 Winter-run Chinook Data file

This file contains updates of the 2025 Winter-run population in the upper Sacramento River. It is updated weekly, or as needed. Updates to carcass counts, aerial redd counts and shallow water redd counts are provided. Data contained within is draft and has not undergone final review or analysis and may change based upon these later reviews. Questions or needs concerning the data in this file can be addressed to Doug Killam at doug.killam@wildlife.ca.gov. Last updated 5-13-25

File size	4050 K
Downloads	15
Date	Tue 05/13/2025 @ 04:57

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2024 Winter-run Chinook Data file

This file contains updates of the 2024 Winter-run population in the upper Sacramento River. It is updated weekly, or as needed. Updates to carcass counts, aerial redd counts and shallow water redd counts are provided. Data contained within is draft and has not undergone final review or analysis and may change based upon these later reviews. Questions or needs concerning the data in this file can be addressed to Doug Killam at doug.killam@wildlife.ca.gov. Last updated 1-17-25

File size	4055 K
Downloads	538
Date	Tue 05/13/2025 @ 04:53

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Salmonid Populations of the Upper Sacramento River Basin In 2023"

In 2023, there were an estimated 17,731 mature Chinook Salmon returning to the USRB that passed upstream of Princeton Ferry (includes angler catch). This includes an estimate of 3,616 late-fall-run, 2,482 winter-run, 65 spring-run, and 11,568 fall-run Chinook Salmon (Table 1). The majority (91%) of these salmon migrated above the Red Bluff Diversion Dam (RBDD) to spawn (or were angler harvested) in the tributaries or in the Sacramento River upstream of Red Bluff. Although it is no longer used as a tool to determine population estimates, the RBDD location is still utilized to maintain historical data consistency in the reporting of salmonid populations in the USRB, (up and downstream of RBDD). Additionally, 228 steelhead (Rainbow Trout greater than 16 inches total length) were counted during monitoring operations for the 2022-2023 steelhead reporting year.

The numbers of spawning Chinook Salmon in the USRB were well below average in 2023. Since the year 2000, spawner counts have averaged 133,766. The 2023 spawner count of 17,344 was the lowest on record since counts began in 1952 and was only 13% of the past 24 years average value, (Appendix Table A7). The winter of 2022-2023 saw the end of the recent three-year drought with abundant rain and snow events that filled the watershed’s lakes and rivers and provided the low numbers of adult spawning salmon with improved spawning conditions.

File size	1243 K
Downloads	103
Date	Thu 02/27/2025 @ 02:55

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