Deepest lakes & reservoirs in Alaska 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 24 articles we have published for Alaska lakes.
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Below are lakes within USA > US West Region > Alaska > Compared by maximum depth in feet. This list does not represent all lakes in Alaska, only the 24 Alaska lake articles we have published on the LakeLubbers website.
Lake name  |
Max depth in feet |
Lake description |
|---|---|---|
| Lake Clark, AK (Alaska, Southwest Region, AK, US West Region, USA) |
1,056 ft | 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) |
950 ft | 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… |
| Iliamna Lake, AK (Alaska, Southwest Region, AK, US West Region, USA) |
900 ft | Also known as Lake Iliamna Iliamna Lake, also known as Lake Iliamna, is the largest lake in Alaska and the second largest freshwater lake contained wholly within the United Stat… |
| Katmai Crater Lake (Alaska, Southwest Region, AK, US West Region, USA) |
800 ft | Little known and seldom seen, Katmai Crater Lake is an example of nature’s handiwork at its most impressive. Located on the Alaskan Peninsula within K… |
| Becharof Lake, AK (Alaska, Southwest Region, AK, US West Region, USA) |
600 ft | Becharof Lake, the second* largest lake in Alaska, is located on the Alaskan Peninsula. Stretching an incredible 290,000 acres, the lake measures 35 m… |
| Kenai Lake, AK (Alaska, Southcentral Region, AK, US West Region, USA) |
541 ft | One of the largest glacial lakes in the Kenai River System, Kenai Lake is a beautiful lake in a road-accessible area of Alaska. The backdrop of the ma… |
| Skilak Lake, AK (Alaska, Southcentral Region, AK, US West Region, USA) |
528 ft | Tucked away in the Kenai National Wildlife Refuge near Soldotna, Skilak Lake is a rare combination of accessibility and Alaskan Wilderness. Called a “… |
| Blue Lake, AK (Alaska, Inside Passage Region, AK, US West Region, USA) |
468 ft | Also known as Blue Lake Reservoir Blue Lake, located in the Alaska Panhandle of southeastern Alaska, is for adventure seekers. The County of Sitka is known for its vistas, mountain bac… |
| Mendenhall Lake (Alaska, Inside Passage Region, AK, US West Region, USA) |
220 ft | Also known as McCush Lake (historic) One of the must-visit destinations of the century is Mendenhall Lake in Alaska’s Inside Passage Region. It may be important to visit the lake this cen… |
| Harding Lake, AK (Alaska, Interior Region, AK, US West Region, USA) |
170 ft | Harding Lake is the largest, deepest, and most easily reached of the four road-accessible lakes within two hours of Fairbanks (Birch Lake, Quartz Lake… |
| Lake Louise, AK (Alaska, Southcentral Region, AK, US West Region, USA) |
155 ft | Also known as Lake Louise State Recreation Area Lake Louise is located in the exciting Matanuska-Susitna Borough (Mat-Su for short) in Alaska. Lake Louise which connects to Susitna Lake boasts that… |
| Big Lake, AK (Alaska, Southcentral Region, AK, US West Region, USA) |
89 ft | There are over 3,000 lakes in the Mat-Su Valley, and Big Lake is one of the largest. The Mat-Su Borough, which is short for Matanuska-Susitna, is 24,0… |