The lake level is controlled by the Cushman No. 1 and No. 2 dams, causing water levels to fluctuate significantly depending on hydroelectric demand.
The reservoir submerged the original townsite of Cushman, which was established as a logging camp in the late 19th century.
The water clarity is often attributed to the high volume of glacial meltwater feeding the Skokomish River headwaters.
The lake area provides critical habitat for the Olympic marmot and various migratory bird species.
During peak summer heat, the water temperature remains relatively cold due to its depth and mountain runoff source.
Lake Cushman is a 4,010-acre reservoir located within the Skokomish River valley on the Olympic Peninsula, Washington. Created by the construction of the Cushman Dam, it serves as a primary source of hydroelectric power for Tacoma Power. The lake is situated at an elevation of approximately 740 feet and is surrounded by the Olympic National Forest. The reservoir is known for its distinctively clear, turquoise-tinted water resulting from glacial silt. The surrounding terrain features steep, rocky slopes and old-growth forest, providing access points for water-based recreation. It is a popular destination for swimming, boating, and fishing for Kokanee salmon and rainbow trout.
The rocky northern shorelines accessible via Lake Cushman Road provide clear views of the water against the backdrop of Mount Ellinor.
Bring water shoes to navigate the rocky shoreline comfortably.
Secure a parking pass in advance, as designated lots fill to capacity rapidly on weekends.
Check current fire danger levels before arriving, as campfires are strictly regulated or prohibited during dry months.
Attempting to park along the narrow, winding roadside of Lake Cushman Road, which is restricted and often leads to towing.
Recreation areas are most accessible from late spring through early autumn; road access to higher elevations may be restricted by snow in winter.
Pack out all trash, adhere to quiet hours at designated campsites, and keep dogs leashed in public recreation areas.
