Deepest lakes & reservoirs in Washington by maximum depth (ft)
The estimated greatest depth of the water in a lake can be measured at the lake’s normal elevation. If the water volume and surface area of a lake are known, an estimate of the lake’s average depth can be calculated:Water volume ÷ Surface Area = Average Depth
Example: 1,000,000 acre-feet ÷ 20,000 acres = 50 feet average depth.
You can find many of the the world’s deepest lakes on LakeLubbers. If you sort the list, you will find the (maximum depth of) the shallowest lakes in our database. Note: For some lakes, lake depth data is unknown, so this table may display 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 maximum depth in feet. This list does not represent all lakes in Washington, only the 58 Washington lake articles we have published on the LakeLubbers website.
Lake name | Max depth in feet | Lake description |
---|---|---|
Lake Tapps (Seattle & Puget Sound Region, WA, US West Region, USA, Washington) |
90 ft | Also known as Tapps Reservoir Located in the populous Seattle and Puget Sound Region of Washington, Lake Tapps delivers water supply, recreation and sound fish ecology to residents … |
Mason Lake, WA (Olympic Peninsula & Pacific Coast Region, WA, US West Region, USA, Washington) |
90 ft | Mason Lake is a natural freshwater lake with an elongated shape located in Mason County, part of Washington state’s Olympic Peninsula tourism region. … |
American Lake, WA (Seattle & Puget Sound Region, WA, US West Region, USA, Washington) |
90 ft | Less than three miles inland from Puget Sound, American Lake is one of the lesser known vacation destinations in Washington’s Seattle-King County Regi … |
Lake Sutherland, WA (Olympic Peninsula & Pacific Coast Region, WA, US West Region, USA, Washington) |
86 ft | If you’re considering a visit to Lake Sutherland, in Washington’s Olympic Peninsula and Pacific Coast Region, you’re in for a real treat! The all-spor … |
Sun Lakes (North Central Washington, US West Region, USA, Washington) |
85 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 … |
Silver Lake Spokane County, WA (Northeast Washington, US West Region, USA, Washington) |
80 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 … |
Lake Cavanaugh, WA (Northwest Washington & Islands, WA, US West Region, USA, Washington) |
80 ft | The snowy peaks of the Northern Cascades complement the multitude of evergreens that surround 844-acre Lake Cavanaugh. Located in Skagit County in Nor … |
Deer Lake, WA (Northeast Washington, US West Region, USA, Washington) |
75 ft | Deer Lake, located in Stevens County, Washington, is a spring-fed and snow-fed lake with approximately a 1,150-acre surface in the Colville River wate … |
Waitts Lake, WA (Northeast Washington, US West Region, USA, Washington) |
68 ft | Set against the tree-clad mountain backdrop of Northeast Washington, Waitts Lake is a beautiful destination for the whole family. Surrounded by nation … |
Diamond Lake, WA (Northeast Washington, US West Region, USA, Washington) |
58 ft | Situated in the heart Washington’s Pend Oreille County, Diamond Lake is one of many sparkling bodies of water belonging to the Evergreen State. Centur … |
Quincy Lakes (North Central Washington, US West Region, USA, Washington) |
54 ft | Also known as Quincy Lakes Wildlife Area, Quincy Lake, Evergreen Reservoir, Burke Lake, Stan Coffin Lake, Ancient Lakes A surreal landscape greets visitors to north-central Washington’s Quincy Lakes Wildlife Area. Pothole lakes filled by water seeping through porous lav … |
Lake Union (Seattle & Puget Sound Region, WA, US West Region, USA, Washington) |
50 ft | Also known as Meman Hartshu, Small Lake, Tenass Chuck, Little Water Surrounded by four vibrant urban neighborhoods, Lake Union sits in the heart of Seattle, Washington. From orcas playing in Puget Sound to sea kayakers … |