Lakes / Minnesota / Three Island
Three Island, Cass County, Minnesota
288 acres
Surface Area
13 ft
Max Depth
7.52 mi
Shoreline
1,366 ft
Surface Elevation
Where It Sits, and How Deep It Goes
Locator - Minnesota
47.04 degrees N, 94.27 degrees W - Cass County. State and county outlines drawn from Census boundary data; the lake marker is placed by its Minnesota DNR coordinates, not by eye. Schematic - not a survey map.
Depth Profile - Three Island
Schematic cross-section drawn to one shared depth scale - not a survey or bathymetric map.
How Three Island Stacks Up
- A shallow lake - typical of most Minnesota lakes, which run under 20 ft at their deepest.
- About 48 miles from Brainerd, as the crow flies.
- 7 fish species on the DNR list for this lake.
Fish Species
Northern PikeLargemouth BassBlack CrappieBluegillPumpkinseedYellow PerchHybrid Sunfish
Species recorded for this lake. Presence only - no abundance ratings.
Facts and Figures
Lake ID (DOW)11017700
CountyCass
Average Water Clarity10.3 ft
Coordinates47.0386, -94.2726
Deepest Natural Lakes in Minnesota
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Mahnomen, Alstead & Arco Mine | Crow Wing | 272 acres | 525 ft |
| 2 | Sabin | St. Louis | 156 acres | 465 ft |
| 3 | Gilbert Pit | St. Louis | 243 acres | 443 ft |
| 4 | Portsmouth Mine | Crow Wing | 149 acres | 395 ft |
| 5 | St James Pit | St. Louis | 124 acres | 381 ft |
Largest Lakes in Minnesota
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Lake of the Woods | Lake of the Woods | 725,583 acres | 210 ft |
| 2 | Rainy | St. Louis | 210,200 acres | 161 ft |
| 3 | Mille Lacs | Mille Lacs | 128,250 acres | 42 ft |
| 4 | Red (Upper Red) | Beltrami | 119,294 acres | 15 ft |
| 5 | Leech | Cass | 103,444 acres | 150 ft |
Sources: Minnesota DNR lake data (ID 11017700); USGS. Verified October 30, 2026.