Lake Roosevelt National Recreation Area is a U.S. national recreation area that encompasses the 130-mile long Franklin D. Roosevelt Lake between Grand Coulee Dam and Northport, Washington, in eastern Washington state. The Grand Coulee Dam was built on the Columbia River in 1941 as part of the Columbia River Basin project. Lake Roos…Lake Roosevelt National Recreation Area is a U.S. national recreation area that encompasses the 130-mile long Franklin D. Roosevelt Lake between Grand Coulee Dam and Northport, Washington, in eastern Washington state. The Grand Coulee Dam was built on the Columbia River in 1941 as part of the Columbia River Basin project. Lake Roosevelt National Recreation Area is a unit of the National Park Service and provides opportunities for fishing, swimming, canoeing, boating, hunting, camping, and visiting historic Fort Spokane and St. Paul's Mission. Crescent Bay Lake in Grant County just southwest of Lake Roosevelt also falls under the jurisdiction of the National Recreation Area.