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River Flows & Lake Levels

River flows as of Oct. 19

Get our latest parks and recreation COVID-19 updates at

Cowlitz River below Mayfield Dam – about 3,590 cubic feet per second (cfs)
Mayfield flow forecast: We plan to remain at this discharge level through the week.

Nisqually River below LaGrande Dam – 1,810 cfs

Wynoochee River above Black Creek – 891 cfs

Wynoochee River at Grisdale – 375 cfs

Green River at Palmer (Tacoma Water’s headworks) – 1,990 cfs

North Fork Skokomish River below Cushman Dam No. 2 – 244 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 Oct. 19

Riffe Lake – 724.73 feet of elevation (maximum of approx. 749 ft)
Learn about changes to Riffe Lake levels.
Mossyrock Park boat launch is open.
Taidnapam North boat launch is open.
Kosmos boat launch and parking lot are closed.
Taidnapam Park boat launch and swim area are closed.
Mossyrock Park swim area is closed.

Alder Lake – 1,194.54 feet of elevation (maximum of 1,207 ft)
Alder Lake Park boat launch is open.
Rocky Point boat launch and day-use area are open.
Stacel Point swim area is open.
Sunny Beach Point swim area is open.
Alder Lake Park day-use area notice: When day-use parking is full, additional visitors will be turned away until parking spaces become available. FYI – this occurs more often on hot days.

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

Lake Cushman – 721.24 feet of elevation (maximum of 738 ft)
The Lake Kokanee boat launch is open.
There is currently no public access to Lake Cushman.
Get information about Skokomish Park at Lake Cushman.

Wynoochee Lake –  773.9 feet of elevation (maximum of 800 ft)
The day-use area is open.

Coho Campground and boat launch are open.

Get current campfire rules on the Parks & Recreation homepage.