Largest lakes & reservoirs in US West Region 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 329 articles we have published for US West Region lakes.
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Below are lakes within USA > US West Region > Compared by surface area in acres. This list does not represent all lakes in US West Region, only the 329 US West Region lake articles we have published on the LakeLubbers website.
Lake name | Surface area in acres | Lake description |
---|---|---|
Utah Lake, UT (Mountainland Region, UT, US West Region, USA, Utah) |
96,900 ac | Utah Lake is located in north-central Utah’s Mountainland region with the major cities of Provo and Orem on the eastern shore. It is the largest fresh … |
Lake Pend Oreille, ID (Idaho, Northern Idaho, US West Region, USA) |
85,960 ac | Also known as Albeni Falls Dam Set in a valley carved by glaciers from Canada, Lake Pend Oreille (pond-a-RAY) is surrounded by mountains with altitudes exceeding 6,000 feet. Its 85, … |
Yellowstone Lake, WY (Northwest Wyoming, US West Region, USA, Wyoming) |
84,288 ac | Yellowstone Lake is located in the southeast corner of Yellowstone National Park, Wyoming. The Park was established in 1872, making it the first natio … |
Lake Roosevelt, WA (Northeast Washington, US West Region, USA, Washington) |
82,000 ac | Also known as Lake Franklin D. Roosevelt Lake Roosevelt, located approximately 90 miles northwest of Spokane, Washington, covers 82,000 acres with a shoreline of 630 miles. Lake Roosevelt, al … |
Lake Clark, AK (Alaska, Southwest Region, AK, US West Region, USA) |
76,892 ac | Lake Clark is located about 150 miles southwest of Anchorage in southern Alaska. The lake spans 128 square miles, making it the seventh* largest fresh … |
Tustumena Lake, AK (Alaska, Southcentral Region, AK, US West Region, USA) |
73,437 ac | Alaska has 17,243 square miles of inland water including both lakes and rivers. The area of inland water is greater than the land mass of Massachusett … |
Bear Lake, ID/UT (Cache Valley Region, UT, Idaho, Southeastern Idaho, US West Region, USA, Utah) |
69,760 ac | A natural freshwater lake straddling the borders of Utah and Idaho, Bear Lake is a 70,000-acre turquoise jewel that lives up to its moniker of “Caribb … |
Upper Klamath Lake, OR (Oregon, Southern Oregon, US West Region, USA) |
61,544 ac | Stretching for an impressive 30 miles, Upper Klamath Lake is the largest freshwater lake in the State of Oregon. Nestled in the Klamath Basin, it is s … |
American Falls Reservoir, ID (Idaho, Southeastern Idaho, US West Region, USA) |
56,000 ac | With more than 56,000 acres of water sport, boating and fishing waters, surrounded by choice camping and picnic areas, American Falls Reservoir in sou … |
Lake Koocanusa, MT / Canada (British Columbia, Canada, Canada, Glacier Country, MT, Montana, US West Region, USA) |
46,720 ac | Also known as Koocanusa Lake, Koocanusa Reservoir In the far north of the United States, tucked into the northwestern end of Montana, is the long, narrow Lake Koocanusa. This lake is actually a man-ma … |
Mono Lake, CA (California, High Sierra Region, CA, US West Region, USA) |
44,762 ac | Mono Lake, located in California’s Eastern Sierra Nevada Mountains, has a long and rich history dating back to its formation over 760,000 years ago. S … |
Clear Lake, CA (California, North Coast Region, CA, US West Region, USA) |
43,785 ac | Clear Lake’s spectacular 43,785 acres earn it the superlative of largest natural freshwater lake located entirely within the state of California. This … |