Wanapum Lake, reservoir on the Columbia River in Washington, United States
Wanapum Lake is a large reservoir in Washington spanning four counties and created by the Wanapum Dam holding back water from the Columbia River. The water stretches between Wanapum Dam downstream and Rock Island Dam upstream, covering over 1000 acres of surface area.
The lake was formed in 1963 when Wanapum Dam was completed to store water and generate electricity for the region. This project was part of a larger effort to manage the Columbia River and provide power to nearby towns and farms.
The reservoir takes its name from the Wanapum people, whose homeland lies along this stretch of the Columbia River. The name was given to the lake when Wanapum Dam was built in 1963.
The lake is accessible from multiple locations with boat ramps and parking areas, while shore trails offer easy walks for visitors of all abilities. Plan to visit early morning or evening for the best fishing conditions and the calmest water.
Wanapum Lake takes its name from the Wanapum people, whose homeland along this stretch of the Columbia was partly submerged when the dam raised the river in 1963. The reservoir reaches upstream from Wanapum Dam to Rock Island Dam, so its water level follows the operation of both dams rather than a natural seasonal cycle.
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