Largest lakes & reservoirs in Southwest Washington by acres
There is no widely-accepted minimum surface area that defines a lake. What LakeLubbers describes as a lake, you might call a pond. Acreage of a lake (or sometimes square kilometers) is most often measured at the top surface area when the lake is at normal elevation. The surface area can be considerably smaller or larger when lake levels are lower or higher than normal. North America’s Lake Superior is the world’s largest freshwater lake by this measure.The other measure of a lake’s size is the lake’s water volume. By that measure, the world’s largest freshwater lake is Lake Baikal in Siberia.
You can find many of the world’s largest lakes (acres) on LakeLubbers in the comparison table below. Note: For some lakes, "Largest Lakes - Acres" data is unknown or does not apply, so you may see 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 surface area in acres. 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  |
Surface area in acres |
Lake description |
|---|---|---|
| Lake Celilo, OR/WA (Mt. Hood-The Gorge Region, OR, Oregon, Southwest Washington, US West Region, USA, Washington) |
9,400 ac | 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 … |
| Alder Lake (Southwest Washington, US West Region, USA, Washington) |
3,065 ac | 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 … |
| Silver Lake Cowlitz County, WA (Southwest Washington, US West Region, USA, Washington) |
3,000 ac | 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 … |
| Vancouver Lake (Southwest Washington, US West Region, USA, Washington) |
2,286 ac | Lying serenely in the Southwest Region of Washington state, Vancouver Lake provides a quiet respite from the cities of Vancouver, Washington and its n … |
| Coldwater Lake, WA (Southwest Washington, US West Region, USA, Washington) |
750 ac | 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 … |