Flow

The Bureau of Reclamation is implementing elevated flows for the Hoopa Valley Tribe’s biennial Boat Dance ceremony. Elevated flows began Aug. 22 and will last through Aug. 30. Changes to flow from Lewiston Dam have been announced via email.

To subscribe to future emails that announce Lewiston Dam change orders, please click the button below.

Fish Health

The Junction City Weir staff have partially pulled operations in anticipation of ceremonial releases from Lewiston Dam. During the Aug. 20 Klamath Fish Health Assessment Team meeting, fish biologists noted that Trinity River Spring run chinook are a few weeks out from spawning and although monitors at the Junction City Weir are documenting about 34.5% bacterial gill insult rate, subsequent mortality in adults has not been observed in pre-spawn mortality surveys or at the weir. Continued high insult rates are leading scientists to question the “why” since Trinity River temperature, turbidity and flow remain favorable for fish health.

Temperature

Keep tabs on Trinity River temperatures by following the USGS gauge links below.

• Trinity River gauge at Lewiston CA – USGS
• Trinity River gauge at Douglas City, CA – USGS
• Trinity River gauge at NF Trinity R NR Helena CA – USGS
• Trinity River gauge at Hoopa CA – USGS

Flow

Keep tabs on Trinity River flow by following the USGS gauge links below.

• Trinity River gauge at Lewiston CA – USGS
• Trinity River gauge at Douglas City, CA – USGS
• Trinity River gauge at NF Trinity R NR Helena CA – USGS
• Trinity River gauge at Hoopa CA – USGS

To help increase restoration projects within Trinity River watershed and reduce red tape, the Trinity River Restoration Program, Bureau of Land Management and the US Forest Service have released the Trinity River Watershed Restoration Project Environmental Assessment. The environmental assessment covers projects related to;

• instream habitat restoration
• upslope habitat restoration
• road maintenance, rehabilitation, and decommissioning activities

The environmental assessment is available to organizations whose restoration projects are funded by or are on land managed by TRRP/Reclamation, BLM, or the USFS and are within the project area and scope. Projects may require further site-specific environmental investigations, depending on the federal agencies involved in each individual project.

Poison Oak (Toxicodendron diversilobum) and Skunk Brush (Rhus trilobata)

Think all “leaves of three” should be avoided? Not so fast. This article dives into the life histories of poison oak (Toxicodendron diversilobum) and its close look-alike, skunk brush (Rhus trilobata), highlighting how to spot the differences, their roles in local ecosystems, and the cultural knowledge tied to each. Use it as a field guide to sharpen your observation skills next time you’re out on the trail — because the forest is full of stories waiting to be read, leaf by leaf.

Photo Comparison: Although from afar they seem very similar, when poison oak (left) and skunk brush (right) are compared side to side they have many different identifying features. [Simone Groves, Hoopa Valley Fisheries Department]

Sunday, Sept. 7, 9am – Trinity River Clean-Up 2025

Junction City, Ca. – Burnt Ranch, Ca.

Join a crew of do-gooders at Pigeon Point Group Campground as we float, walk, and retrieve trash from our beloved Wild and Scenic Trinity River from Junction City to Burnt Ranch.

The Trinity County RCD will be providing morning snacks and refreshments, trash collecting equipment and PPE, shuttle vehicles to and from river accesses, group rafting opportunities provided by 6 Rivers Rafting and Bigfoot Rafting, and a post event BBQ to celebrate a job well done.

Registration is encouraged.

Sept. 17 – All Day Quarterly TMC Meeting

In Person: Trinity River Restoration Program in Weaverville, Ca.

Virtual: via Microsoft Teams

Join the meeting

Meeting ID: 293 807 766 572

Passcode: KE7YR33m

Sept. 24, 6pm – Science on Tap

Trinity County Brewing Co.

This month’s Science on Tap features a presentation from Nate Libal, Senior Environmental Scientist Specialist – Wolf, who will present: “Gray Wolves – Ecology and Management in California”

Nate is a Wolf Specialist for the California Department of Fish and Wildlife. Prior to joining CDFW in 2024, he spent 10 years working for wolf management programs in Oregon and Wisconsin.

This presentation will cover the recent history of wolves in California, including current numbers, distribution and ongoing research. It will also cover some of the challenges of wolf management with an emphasis on wolf/livestock conflict.

Oct. 4, 9am – 4pm – Salmon Meets Harvest Festival

Highland Art Center Meadow in Weaverville

Join us on Saturday, October 4, from 9:00 a.m. to 4:00 p.m. at the Highland Arts Center Meadow on Main Street, Weaverville, for the Salmon Meets Harvest Festival, a day of celebration that brings together the 27th Annual Trinity River Salmon Festival and the 22nd Annual Harvest Festival! These two beloved events are again uniting and offering a unique blend of festivities, flavors, and cultural celebrations. We hope to see you there!

California farmers, anglers and researchers often clash over salmon. Science united them

Phys.org | by Calista Oetama | Aug. 13, 2025

Click here to read

After nearly 100 years, adult winter-run Chinook salmon seen in California river

The Guardian | July 31, 2025

Click here to read

USGS: Integrating water availability in the Klamath Basin: from drought to dam removal

Maven’s Notebook | USGS | July 31, 2025

Click here to read