Deepest lakes & reservoirs in Southwest 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 5 articles we have published for Southwest Washington lakes.
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Below are lakes within USA > US West Region > Washington > Southwest Washington > Compared by maximum depth in feet. This list does not represent all lakes in Southwest Washington, only the 5 Southwest Washington lake articles we have published on the LakeLubbers website.
Lake name  |
Max depth in feet |
Lake description |
|---|---|---|
| Alder Lake (Southwest Washington, US West Region, USA, Washington) |
290 ft | Also known as Alder Reservoir Vacationers planning to visit Mount Rainer need to fit beautiful Alder Lake into their plans. This reservoir in the Southwest Region of Washington off … |
| Coldwater Lake, WA (Southwest Washington, US West Region, USA, Washington) |
190 ft | Today Coldwater Lake is a peaceful, scenic 750-acre lake, but the violence of Mount St. Helens created the lake in 1980. On May 18, 1980, a 5.1 magnit … |
| Lake Celilo, OR/WA (Mt. Hood-The Gorge Region, OR, Oregon, Southwest Washington, US West Region, USA, Washington) |
27 ft | Also known as Dalles Lock and Dam Beautiful and serene Lake Celilo is located off of I-84 about an hour and a half east of Portland, Oregon. Lake Celilo stretches 24 miles long and str … |
| Vancouver Lake (Southwest Washington, US West Region, USA, Washington) |
15 ft | Lying serenely in the Southwest Region of Washington state, Vancouver Lake provides a quiet respite from the cities of Vancouver, Washington and its n … |
| Silver Lake Cowlitz County, WA (Southwest Washington, US West Region, USA, Washington) |
10 ft | Silver Lake is a shallow 3,000-acre wetland lake located in southwest Washington. Formed by an early eruption of Mount St. Helens, which permanently d … |