River Flows & Lake Levels

We’d Like Your Feedback
We are researching potential improvements at the Taidnapam North and Mossyrock Park boat launches. We’d like your feedback about the possible options! Check them out here. Please send your feedback to cowlitz@cityoftacoma.org.

River flows as of Nov. 29

To get real-time flow information, click the links for each river, then scroll down the page and click “Today’s statistical data.”

Cowlitz River below Mayfield Dam – about 4,720 cubic feet per second (cfs)
Mayfield flow forecast (typically updated on Monday and Thursday afternoons) as of Monday, Nov. 28: We plan to increase discharge to about 6,400 cfs on Tuesday. We will probably decrease discharge to about 4,100 cfs by Thursday. It’s possible discharge may fluctuate between 4,100 cfs and 6,400 cfs through the week.

Nisqually River below LaGrande Dam – 992 cfs

Wynoochee River above Black Creek – 728 cfs

Wynoochee River at Grisdale – 294 cfs

Green River at Palmer (Tacoma Water’s headworks) – 771 cfs

North Fork Skokomish River below Cushman Dam No. 2 – 318 cfs

Check out water safety resources. River flows can change at any time.

Subscribe to available Water Alerts provided by the US Geological Survey.

Lake levels and boat launches as of Nov. 29

Riffe Lake – 706.93 feet of elevation (maximum of approx. 749 ft)
Learn about changes to Riffe Lake levels.
Mossyrock Park boat launch is closed. The day-use area is open.
Taidnapam North boat launch is closed.
Kosmos boat launch and parking lot are closed.
Taidnapam Park boat launch is closed.

Alder Lake – 1,176.91 feet of elevation (maximum of 1,207 ft)
Alder Lake Park boat launch and day-use area are open.
Rocky Point boat launch (hand-launch only), day-use area, and campground are open.
Stacel Point day-use area is open.
Sunny Beach Point day-use area and swim area are closed. (They are open May 15 – Sept. 15.)

Mayfield Lake – may fluctuate 4 feet weekly, between 421 and 425 feet of elevation (maximum of 425 ft)
Mayfield Lake Park boat launch and day-use area are open.

Lake Cushman – 703.8 feet of elevation (maximum of 738 ft)
The Lake Kokanee boat launch is open.
Get information about Skokomish Park at Lake Cushman.

Wynoochee Lake – 765.9 feet of elevation (maximum of 800 ft)
The day-use area is open.

Coho Campground and boat launch are closed. They are typically open from mid-May to October.

Get current campfire rules on the Parks & Recreation homepage.

River flows could change at any time so boaters and anglers should remain alert for this possibility.