Deepest lakes & reservoirs in Seattle & Puget Sound Region, WA 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 14 articles we have published for Seattle & Puget Sound Region, WA lakes.
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Below are lakes within USA > US West Region > Washington > Seattle & Puget Sound Region, WA > Compared by maximum depth in feet. This list does not represent all lakes in Seattle & Puget Sound Region, WA, only the 14 Seattle & Puget Sound Region, WA lake articles we have published on the LakeLubbers website.
Lake name  |
Max depth in feet |
Lake description |
|---|---|---|
| Lake Washington, WA (Seattle & Puget Sound Region, WA, US West Region, USA, Washington) |
214 ft | Lake Washington has the distinction of being the second largest natural lake in the state of Washington. This glacial lake is long and narrow, a “ribb … |
| Mayfield Lake (Seattle & Puget Sound Region, WA, US West Region, USA, Washington) |
190 ft | Mayfield Lake is cradled in the foothills of the Cascades in Lewis County, Washington. This 2,200-acre reservoir is conveniently located close to Moun … |
| Lake Sammamish, WA (Seattle & Puget Sound Region, WA, US West Region, USA, Washington) |
105 ft | At just under 5,000 acres, Lake Sammamish is one of the major recreational lakes in the state. The lake provides activities for fishermen, boaters, je … |
| 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 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 … |
| 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 … |
| Wildcat Lake, WA (Seattle & Puget Sound Region, WA, US West Region, USA, Washington) |
33 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 … |
| Florence Lake (Seattle & Puget Sound Region, WA, US West Region, USA, Washington) |
30 ft | Also known as Lake Florence Florence Lake is special to Seattle and Puget Sound residents. Local tribes were familiar with Anderson Island long before its ‘official’ discovery in … |
| Kitsap Lake, WA (Seattle & Puget Sound Region, WA, US West Region, USA, Washington) |
29 ft | One of 101 lakes in Kitsap County, Washington, Kitsap Lake is conveniently located just three miles west of the city of Bremerton. This lake, which is … |
| Lake Morton (Seattle & Puget Sound Region, WA, US West Region, USA, Washington) |
23 ft | Lake Morton is a small wilderness haven with city amenities nearby, located about 30 miles southeast of Seattle in King County. With snow-capped Mt. R … |
| Josephine Lake (Seattle & Puget Sound Region, WA, US West Region, USA, Washington) |
21 ft | Also known as Lake Josephine Located on the east side of Anderson Island, Josephine Lake is a residential paradise. Anderson is a large island located in Puget Sound, a waterway w … |
| Horseshoe Lake, WA (Seattle & Puget Sound Region, WA, US West Region, USA, Washington) |
20 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 … |