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.

Volunteer camp host needed at Rocky Point Campground in Eatonville: Do you love the outdoors and providing exceptional customer service? Check out this volunteer camp host opportunity!

River flows as of Aug. 18

Cowlitz River below Mayfield Dam – about 6,430 cubic feet per second (cfs)
Mayfield flow forecast (typically updated on Monday and Thursday afternoons) as of Monday, Aug. 15: We plan to increase discharge to about 6,700 cfs on Tuesday and maintain that discharge through Thursday.  We will start to decrease discharge starting Friday and getting down to about 3,600 cfs on Sunday.

Nisqually River below LaGrande Dam – 1,010 cfs

Wynoochee River above Black Creek – 262 cfs

Wynoochee River at Grisdale – 254 cfs

Green River at Palmer (Tacoma Water’s headworks) – 150 cfs

North Fork Skokomish River below Cushman Dam No. 2 – 157 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 Aug. 18

Riffe Lake – 738.01 feet of elevation (maximum of approx. 749 ft)
Learn about changes to Riffe Lake levels.
Mossyrock Park boat launch, day-use area, and swim area are open. (Please note: The day-use area is closed to additional visitors once the parking lot reaches full capacity.)
Taidnapam North boat launch is open.
Kosmos boat launch and parking lot are closed.
Taidnapam Park boat launch is closed. The swim area is not usable.

Alder Lake – 1,199.6 feet of elevation (maximum of 1,207 ft)
Alder Lake Park boat launch and day-use area are open.
Rocky Point boat launch, day-use area, and campground are open.
Stacel Point day-use area and swim area are open.
Sunny Beach Point day-use area and swim area are open.

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

Wynoochee Lake – 789.04 feet of elevation (maximum of 800 ft)
The day-use area is open.

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

Get current campfire rules on the Parks & Recreation homepage.