Largest lakes & reservoirs in Olympic Peninsula & Pacific Coast Region, WA by water volume
The estimated volume of water that a lake contains is measured at the lake’s normal elevation. By this measure, the world’s largest freshwater lake is Siberia’s Lake Baikal.Water Volume can be measured in acre-feet, in cubic miles, or in cubic kilometers. One acre-foot is the amount of water needed to cover one acre (43,560 square feet) to a depth of one foot. One cubic mile equals 3,379,200 acre-feet. One cubic kilometer equals 810,713 acre-feet. 1 acre-foot is equal to 325,851 US gallons. Siberia’s Lake Baikal contains about 6,276,367,740,000,000 gallons of freshwater – nearly 1 million gallons for every living person on earth.
The other – and more widely used – measure of a lake’s size is the lake’s surface acreage. By that measure, the world’s largest freshwater lake is North America’s Lake Superior.
Note: In the United States, an acre foot is a unit of volume used to refer to large-scale bodies of water. It is defined by the volume of water needed to cover 1 acre of surface area to a depth of 1 foot.
You can find many of the the world’s largest lakes (by water volume) on LakeLubbers. Note: For some lakes, the water volume data is unknown or does not apply, so you may see fewer lakes than the total 7 articles we have published for Olympic Peninsula & Pacific Coast Region, WA lakes.
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Below are lakes within USA > US West Region > Washington > Olympic Peninsula & Pacific Coast Region, WA > Compared by water volume. This list does not represent all lakes in Olympic Peninsula & Pacific Coast Region, WA, only the 7 Olympic Peninsula & Pacific Coast Region, WA lake articles we have published on the LakeLubbers website.
Lake name  |
Water vol. in ac-ft |
Lake description |
|---|---|---|
| Lake Ozette, WA (Olympic Peninsula & Pacific Coast Region, WA, US West Region, USA, Washington) |
1,012,310 ac-ft | (Also known as Ozette Lake) Nestled in dense forest just a few miles from the Pacific Coast, Lake Ozette sits snuggled into Washington’s Olympic Peninsula tourism region, on the… |
| Lake Cushman, WA (Olympic Peninsula & Pacific Coast Region, WA, US West Region, USA, Washington) |
450,000 ac-ft | Nestled in the foothills of the majestic Olympic Mountains, Lake Cushman is known for its clear, blue water and alpine beauty. With 23 miles of shorel… |
| Mason Lake, WA (Olympic Peninsula & Pacific Coast Region, WA, US West Region, USA, Washington) |
48,000 ac-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.… |
| Duck Lake (Olympic Peninsula & Pacific Coast Region, WA, US West Region, USA, Washington) |
30,000 ac-ft | Duck Lake is an unlikely candidate for one of the best fishing lakes in southwestern Washington but holds its own with the best of contenders! Located… |