Rock, Cass County, Minnesota
261 acres
Surface Area
17 ft
Max Depth
3.41 mi
Shoreline
1,275 ft
Surface Elevation
Where It Sits, and How Deep It Goes
Locator - Minnesota
46.43 degrees N, 94.47 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 - Rock
Schematic cross-section drawn to one shared depth scale - not a survey or bathymetric map.
How Rock Stacks Up
- A shallow lake - typical of most Minnesota lakes, which run under 20 ft at their deepest.
- About 14 miles from Brainerd, as the crow flies.
- 11 fish species on the DNR list for this lake.
Fish Species
Northern PikeLargemouth BassBlack CrappieBluegillPumpkinseedYellow PerchBowfinBrown BullheadHybrid SunfishWhite SuckerYellow Bullhead
Species recorded for this lake. Presence only - no abundance ratings.
Facts and Figures
Lake ID (DOW)11032400
CountyCass
Average Water Clarity7 ft
Coordinates46.4266, -94.4745
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 11032400); USGS. Verified October 30, 2026.