Largest lakes & reservoirs in Washington by water volume
The estimated volume of water that a lake contains is measured at the lake’s normal elevation. By this measure, the world’s largest freshwater lake is Siberia’s Lake Baikal.Water Volume can be measured in acre-feet, in cubic miles, or in cubic kilometers. One acre-foot is the amount of water needed to cover one acre (43,560 square feet) to a depth of one foot. One cubic mile equals 3,379,200 acre-feet. One cubic kilometer equals 810,713 acre-feet. 1 acre-foot is equal to 325,851 US gallons. Siberia’s Lake Baikal contains about 6,276,367,740,000,000 gallons of freshwater – nearly 1 million gallons for every living person on earth.
The other – and more widely used – measure of a lake’s size is the lake’s surface acreage. By that measure, the world’s largest freshwater lake is North America’s Lake Superior.
Note: In the United States, an acre foot is a unit of volume used to refer to large-scale bodies of water. It is defined by the volume of water needed to cover 1 acre of surface area to a depth of 1 foot.
You can find many of the the world’s largest lakes (by water volume) on LakeLubbers. Note: For some lakes, the water volume data is unknown or does not apply, so you may see fewer lakes than the total 58 articles we have published for Washington lakes.
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Below are lakes within USA > US West Region > Washington > Compared by water volume. This list does not represent all lakes in Washington, only the 58 Washington lake articles we have published on the LakeLubbers website.
Lake name | Water vol. in ac-ft | Lake description |
---|---|---|
Silver Lake Spokane County, WA (Northeast Washington, US West Region, USA, Washington) |
14,580 ac-ft | Visitors to Northeast Washington can find a lakeside paradise at Silver Lake. Only 20 minutes southwest of Spokane, Silver Lake offers nearly 500 acre … |
Sun Lakes (North Central Washington, US West Region, USA, Washington) |
13,149 ac-ft | (Also known as Blue Lake, Deep Lake, Soap Lake, Dry Falls Lake, Lenore Lake, Park Lake, Meyers Lake, Mirror Lake, Perch Lake, Alkali Lake, Green Lake, Castle Lake) All kinds of recreation await visitors to Sun Lakes in Washington’s North Central region. These mostly natural lakes all share a common origin, having … |
Eloika Lake, WA (Northeast Washington, US West Region, USA, Washington) |
6,018 ac-ft | Eloika Lake is nestled in the foothills of the Selkirk Mountain Range in the northern most part of Spokane County in Washington. The Spokane Indian Na … |
Wildcat Lake, WA (Seattle & Puget Sound Region, WA, US West Region, USA, Washington) |
2,160 ac-ft | Wildcat Lake can be found in the state of Washington’s Seattle and Puget Sound tourism region. It has a surface area of 120 acres and an average depth … |
Horseshoe Lake, WA (Seattle & Puget Sound Region, WA, US West Region, USA, Washington) |
480 ac-ft | One of three lakes in Washington state of the same name, Kitsap County’s Horseshoe Lake is the tiniest – and arguably the most beautiful – of them all … |