Michigan lake depth maps
Diamond Lake depth map
Diamond Lake in Cass County, Michigan reaches a depth of 64 feet. Diamond Lake is charted here across 7 closed depth contours, from the 5 ft line down to 60 ft, enclosing about 1,016 acres of water. Half of that water lies inside the 20 ft line, and only 68 acres lie inside the deepest one. Every contour is on the interactive map below, free and without an account.
Data: Michigan DNR Inland Lake Contours (public record). Contours closed, checked and area-computed by Jordan Carter, founder of GilledIt · page updated
Diamond Lake depth chart: 7 depth contours from 5 to 60 ft
Data: Michigan DNR Inland Lake Contours (public record), retrieved August 2026 · depths change over time · not for navigation
| Depth contour | Water inside it | Share of mapped water |
|---|---|---|
| 5 ft | 1,016 acres | 100% |
| 10 ft | 725 acres | 71% |
| 20 ft | 421 acres | 41% |
| 30 ft | 336 acres | 33% |
| 40 ft | 238 acres | 23% |
| 50 ft | 132 acres | 13% |
| 60 ft | 68 acres | 6.7% |
Acreages are computed from the closed Michigan DNR Inland Lake Contours contour rings, with islands subtracted. Shares are of the 1,016 acres inside the outermost charted contour (the 5 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. The survey also records a 64 ft sounding, marked as a point rather than a closed contour, so it is not charted as a band.
Fishing Diamond Lake: a wide shallow flat over a deep hole
Inside its outermost 5 ft contour the survey charts about 1,016 acres of Diamond Lake, with the 20 ft line enclosing half of it, so the bulk of this Cass County water sits on a shallow flat, with the real depth packed into one part of the basin. The sharpest change on the chart is between 5 and 10 ft, where the mapped water loses 291 acres in 5 ft of depth, that band is the contour to work first, because it is where the bottom stops being flat. The deepest 60 ft contour holds 68 acres, 6.7% of the mapped water, toward the northeastern corner of the lake. 64 ft of water makes this a two-story fishery: warm-water fish hold the 5-to-20 ft ground while the basin can stay cold below the summer thermocline, and the traffic between the two runs along the 5–10 ft break at first and last light.
Ice fishing on Diamond Lake
Diamond Lake freezes later and less evenly than the shallow waters around it, and the winter bite sets up on the first real break rather than out over the 60 ft hole. The 5–10 ft band on the chart above is that edge: 291 acres of bottom tilt away there, and panfish and walleye slide up and down it through the day. Late ice pushes fish back onto the 5-to-20 ft flat. Check ice thickness locally before you walk out.
Diamond Lake depth map FAQs
- How deep is Diamond Lake?
- Diamond Lake reaches a maximum depth of 64 feet in the Michigan DNR Inland Lake Contours survey. Most of it is far shallower: the survey charts 7 closed depth contours over about 1,016 acres, and half of that water sits inside the 20 ft line. The 64 ft figure is a single recorded sounding rather than a closed contour, so the deepest line you can actually trace on the map is 60 ft.
- Where is the deepest part of Diamond Lake?
- The deepest charted water on Diamond Lake lies inside the 60 ft contour, toward the northeastern corner of the lake. That contour encloses 68 acres, 6.7% of the mapped water, so it is a small target on a big lake, the depth chart above gives the contour to line up on.
- How much of Diamond Lake is shallower than 20 feet?
- About half. The 20 ft contour encloses 421 acres of the roughly 1,016 acres inside the outer 5 ft line, so the other half of the water is shallower than 20 feet. The sharpest drop is between 5 and 10 feet, where the mapped water sheds 291 acres.
- How accurate is this Diamond Lake depth map?
- The contours come from the Michigan DNR Inland Lake Contours 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. 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 Diamond Lake
- Donnell Lake depth map · 60+ ft max · 4 mi away
- Birch Lake depth map · 80+ ft max · 6 mi away
- Shavehead Lake depth map · 70+ ft max · 7 mi away
- Baldwins Lake depth map · 55+ ft max · 11 mi away
- Corey Lake depth map · 70+ ft max · 12 mi away
Mapped fishing venues near Diamond Lake
Diamond Lake in the venue directory covers access and fishing details for this water.
- Donnell Lake · 4 mi away
- Birch Lake · 6 mi away
- Shavehead Lake · 7 mi away
Fishing in Michigan needs a state license: Michigan fishing license guide · all Michigan venues