Deepest lakes & reservoirs in USA 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 1644 articles we have published for USA lakes.
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Below are lakes within USA > Compared by maximum depth in feet. This list does not represent all lakes in USA, only the 1644 USA lake articles we have published on the LakeLubbers website.
Lake name | Max depth in feet | Lake description |
---|---|---|
Lake Koocanusa, MT / Canada (British Columbia, Canada, Canada, Glacier Country, MT, Montana, US West Region, USA) |
370 ft | 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 … |
Priest Lake, ID (Idaho, Northern Idaho, US West Region, USA) |
369 ft | Located in the most northern portion of Idaho’s Panhandle, Priest Lake is within 30 miles of the Canadian Border. Priest Lake was naturally created at … |
Lake Memphremagog, VT / Canada (Canada, Northeast Kingdom Region, VT, Quebec, Canada, US New England Region, USA, Vermont) |
351 ft | Also known as Lac Memphremagog A perfect reflection of brightly colored mountains among a blue backdrop is cast upon Lake Memphremagog’s smooth, motionless surface. A kayaker, sitti … |
Wazee Lake, WI (Mississippi-Chippewa Rivers Region, WI, US Midwest Region, USA, Wisconsin) |
350 ft | Wazee Lake is a 146-acre lake east of Black River Falls, Jackson County, in the Mississippi-Chippewa Rivers Region of Wisconsin. The lake is the deepe … |
Roosevelt Lake, AZ (Arizona, North Central Arizona, US Southwest Region, USA) |
349 ft | Also known as Theodore Roosevelt Lake, Lake Roosevelt With 21,500 acres at full pond and 128 miles of shoreline, Roosevelt Lake is the largest body of water contained entirely within Arizona; the larger L … |
Pyramid Lake, NV (Nevada, Renoe-Tahoe Territory, NV, US West Region, USA) |
344 ft | Pyramid Lake is a true natural wonder located in the Pyramid Lake Paiute Indian Reservation in western Nevada. Covering 117,400 acres, it is the third … |
Blue Mesa Reservoir, CO (Colorado, Southwest Colorado, US West Region, USA) |
342 ft | Also known as Blue Mesa Lake Beautiful mesas, deep canyons, and steep rocky cliffs surround Blue Mesa Reservoir, the second largest lake entirely in Colorado. The clear, blue, mou … |
Cle Elum Lake, WA (North Central Washington, US West Region, USA, Washington) |
333 ft | Also known as Lake Cle Elum Providing much needed water to the dry, fertile soil of north-central Washington, Cle Elum Lake is the largest of four irrigation storage reservoirs i … |
Lake Ozette, WA (Olympic Peninsula & Pacific Coast Region, WA, US West Region, USA, Washington) |
331 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 … |
Castaic Lake, CA (California, Los Angeles County, CA, US West Region, USA) |
330 ft | Also known as Lake Castaic Almost every lake promises something for everyone, but Castaic Lake in Los Angeles County, California delivers. With separate sections of its 2,427 ac … |
Whatcom Lake, WA (Northwest Washington & Islands, WA, US West Region, USA, Washington) |
330 ft | Also known as Lake Whatcom Whatcom Lake is a 5,000-acre natural lake surrounded by mountainous terrain located in Whatcom County, Washington. Whatcom is from a Nooksack Indian w … |
Summersville Lake, WV (Mountain Lakes Region, WV, US South Region, USA, West Virginia) |
327 ft | Also known as Summersville Reservoir Scenic Summersville Lake is the largest lake in West Virginia. The reservoir was built by the U.S. Army Corps of Engineers for flood control on the Ga … |