Indiana lake depth maps
Cass Lake depth map
Cass Lake in LaGrange County, Indiana reaches a depth of 21 feet. Cass Lake is charted here across 5 closed depth contours, from the 6 ft line down to 21 ft, enclosing about 57 acres of water. Half of that water lies inside the 15 ft line, and only 2.5 acres lie inside the deepest one. Every contour is on the interactive map below, free and without an account.
Data: Indiana DNR Lake Bathymetry (credit: Indiana DNR). Contours closed, checked and area-computed by Jordan Carter, founder of GilledIt · page updated
Cass Lake depth chart: 5 depth contours from 6 to 21 ft
Data: Indiana DNR Lake Bathymetry (credit: Indiana DNR), retrieved August 2026 · depths change over time · not for navigation
| Depth contour | Water inside it | Share of mapped water |
|---|---|---|
| 6 ft | 57 acres | 100% |
| 12 ft | 35 acres | 61% |
| 15 ft | 24 acres | 43% |
| 18 ft | 9.2 acres | 16% |
| 21 ft | 2.5 acres | 4.4% |
Acreages are computed from the closed Indiana DNR Lake Bathymetry contour rings, with islands subtracted. Shares are of the 57 acres inside the outermost charted contour (the 6 ft line), which is the outer edge of the mapped water, several state files carry no 0 ft shoreline line, so this is not the same as a share of the lake's published surface area.
Fishing Cass Lake: steep sides for its size
About 57 acres of Cass Lake sit inside the survey's 6 ft contour, and half of that water is already gone by the 15 ft line: depth comes quickly here, with no long shallow margin before the bottom drops away. The steepest break on the chart runs from 15 down to 18 ft: 15 acres of bottom fall away across 3 ft there, which makes that band the first contour to work. The deepest 21 ft contour holds 2.5 acres, 4.4% of the mapped water, toward the western side of the lake. At 21 ft top to bottom, weed growth shapes this water more than depth does, but the 2.5-acre deep spot still concentrates fish in the heat of summer, and the one-contour depressions on the chart are the ones most anglers row straight over.
Ice fishing on Cass Lake
Shallow water like Cass Lake is usually among the first to make safe ice, and with only 2.5 acres inside the 21 ft contour the fish have very little deep water to spread into once the weed beds die back. That hole, and the subtle single-contour depressions across the 57-acre basin, are where to start. Check ice thickness locally before you walk out.
Cass Lake depth map FAQs
- How deep is Cass Lake?
- Cass Lake reaches a maximum depth of 21 feet in the Indiana DNR Lake Bathymetry survey. Most of it is far shallower: the survey charts 5 closed depth contours over about 57 acres, and half of that water sits inside the 15 ft line.
- Where is the deepest part of Cass Lake?
- The deepest charted water on Cass Lake lies inside the 21 ft contour, toward the western side of the lake. That contour encloses 2.5 acres, 4.4% of the mapped water, so it is a small target on a small water, the depth chart above gives the contour to line up on.
- How much of Cass Lake is shallower than 15 feet?
- About half. The 15 ft contour encloses 24 acres of the roughly 57 acres inside the outer 6 ft line, so the other half of the water is shallower than 15 feet. The sharpest drop is between 15 and 18 feet, where the mapped water sheds 15 acres.
- How accurate is this Cass Lake depth map?
- The contours come from the Indiana DNR Lake Bathymetry survey, retrieved August 2026 and last rebuilt on August 19, 2026. Depths change over time with water levels and sediment, so treat this map as a planning guide for fishing, and never use it for navigation. Per Indiana DNR, the data are graphical representations for reference only, not a survey instrument. Acreages are computed from the published contour geometry, not from a separate area survey, so read them as close approximations.
Depth maps for lakes near Cass Lake
- Hunter Lake depth map · 24 ft max · 2 mi away
- Emma Lake depth map · 30 ft max · 8 mi away
- South Twin Lake depth map · 50 ft max · 9 mi away
- North Twin Lake depth map · 35 ft max · 10 mi away
- Fish Lake depth map · 70 ft max · 10 mi away
Mapped fishing venues near Cass Lake
Cass Lake in the venue directory covers access and fishing details for this water.
- Hunter Lake · 2 mi away
- Emma Lake · 8 mi away
- South Twin Lake · 9 mi away
Fishing in Indiana needs a state license: Indiana fishing license guide · all Indiana venues