| Thunder Lake | |
| Location: | Cass County, Minnesota |
| Coordinates: | 46.9547°N -93.9681°W |
| Type: | reservoir |
| Pushpin Map: | Minnesota |
| Pushpin Map Alt: | Location of lake in Minnesota. |
Thunder Lake is a lake in Cass County, Minnesota, in the United States. Thunder Lake is 1,346 acres in size and reaches a depth of 95 feet. Thunder Lake is located in the western corner of the Mississippi River - Grand Rapids Watershed and is surrounded by dense forested areas including the Chippewa National Forest and the Land O'Lakes State Forest. The shoreline is approximately 16 miles long and 83% of the lake has a depth greater than 15 feet. Thunder Lake has high water clarity with a Secchi depth of approximately 17 feet.[1]
"Thunder Lake" is likely an English translation of the Native American name.[2]