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River Flows & Lake Levels

River flows as of June 16

Get our latest parks and recreation COVID-19 updates at

You’re invited: Cowlitz Annual Program Review Virtual Public Meeting –  2 – 4 p.m. on June 23 

Get information about the Barrier Dam spillway upgrade project taking place through Oct. 1.

Cowlitz River below Mayfield Dam – about 4,570 cubic feet per second (cfs)
Mayfield flow forecast (typically updated on Monday and Thursday afternoons) as of Monday, June 14: Discharge will increase to about 5,500 cfs on Wednesday or Thursday morning, then decrease to about 4,600 cfs by the next day.  Discharge will then remain at that level through the rest of the week.

Nisqually River below LaGrande Dam – 1,270 cfs

Wynoochee River above Black Creek – 562 cfs

Wynoochee River at Grisdale – 220 cfs

Green River at Palmer (Tacoma Water’s headworks) – 809 cfs

North Fork Skokomish River below Cushman Dam No. 2 – 261 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 June 16

Riffe Lake – 738.45 feet of elevation (maximum of approx. 749 ft)
Learn about changes to Riffe Lake levels.
Mossyrock Park boat launch (both lanes and the dock) and day-use area are 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 – 1,204.06 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 is open. The swim area is closed.
Sunny Beach Point is 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 – 737.45 feet of elevation (maximum of 738 ft)
The Lake Kokanee boat launch is open.
Get information about Skokomish Park at Lake Cushman.

Wynoochee Lake –  792.51 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.