Largest lakes & reservoirs in Washington by shoreline length
The length of the exterior shoreline around a lake is measured at the lake’s normal elevation. The shoreline length can be considerably shorter or longer when lake water levels are lower or higher than normal. A lake with many coves has a much longer shoreline than a lake of similar surface area that is nearly circular in shape.When known, the shoreline miles that we report in our statistics include only the lake’s exterior shoreline, and exclude the shorelines of islands located within a lake’s boundaries. In lakes with many islands, those islands’ combined shorelines may exceed a lake’s exterior shoreline.
You can find many of the world’s longest-shoreline lakes on LakeLubbers. Note: For some lakes, "Longest Shorelines" data is unknown or does not apply, 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 longest shoreline length in miles. This list does not represent all lakes in Washington, only the 58 Washington lake articles we have published on the LakeLubbers website.
Lake name | Shoreline length in miles | Lake description |
---|---|---|
Lake Quinault, WA (Olympic Peninsula & Pacific Coast Region, WA, US West Region, USA, Washington) |
12 mi | Also known as Quinault Lake Located in northwest Washington’s Olympic Peninsula tourism region, Lake Quinault is a clear, deep lake lying just west of the Olympic Mountains. Twel … |
American Lake, WA (Seattle & Puget Sound Region, WA, US West Region, USA, Washington) |
12 mi | 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 … |
Mason Lake, WA (Olympic Peninsula & Pacific Coast Region, WA, US West Region, USA, Washington) |
11 mi | Mason Lake is a natural freshwater lake with an elongated shape located in Mason County, part of Washington state’s Olympic Peninsula tourism region. … |
Newman Lake, WA (Northeast Washington, US West Region, USA, Washington) |
10 mi | Newman Lake is a natural 1,200-acre lake located about 20 miles northeast of Spokane, Washington. Although Newman Lake is relatively small compared to … |
Bumping Lake, WA (South Central Washington, US West Region, USA, Washington) |
10 mi | Also known as Bumping Reservoir Lying near the shadow of Mt. Rainier, Bumping Lake is the first of six reservoirs owned and operated by the Bureau of Reclamation. Part of the Yakima … |
Silver Lake Spokane County, WA (Northeast Washington, US West Region, USA, Washington) |
9 mi | Visitors to Northeast Washington can find a lakeside paradise at Silver Lake. Only 20 minutes southwest of Spokane, Silver Lake offers nearly 500 acre … |
Deer Lake, WA (Northeast Washington, US West Region, USA, Washington) |
9 mi | 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 … |
Loon Lake, WA (Northeast Washington, US West Region, USA, Washington) |
8 mi | Crystal clear water from a natural spring fills Loon Lake located in Stevens County in northeastern Washington. In a beautiful mountain setting surrou … |
Vancouver Lake (Southwest Washington, US West Region, USA, Washington) |
7 mi | Lying serenely in the Southwest Region of Washington state, Vancouver Lake provides a quiet respite from the cities of Vancouver, Washington and its n … |
Diamond Lake, WA (Northeast Washington, US West Region, USA, Washington) |
7 mi | 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 … |
Eloika Lake, WA (Northeast Washington, US West Region, USA, Washington) |
6 mi | 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 … |
Sun Lakes (North Central Washington, US West Region, USA, Washington) |
6 mi | 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 … |