How deep is Diamond Lake?

Diamond Lake reaches a maximum depth of 64 feet, according to the Michigan DNR Inland Lake Contours survey. Most of the lake is shallower, with 12 mapped depth bands between the shoreline and the deepest hole.

Where is the deepest part of Diamond Lake?

The deepest surveyed water on Diamond Lake sits toward the northeastern corner of the lake, inside the 64 ft contour. The interactive depth map above shows the full basin outline and the breaks leading into it.

How accurate is this Diamond Lake depth map?

The contours come from the Michigan DNR Inland Lake Contours survey. 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.

Michigan lake depth maps

Diamond Lake depth map

Diamond Lake in Cass County, Michigan reaches a depth of 64 feet. The official Michigan survey maps 12 depth bands across 25 contour lines. This free map of Diamond Lake shows every surveyed contour as an interactive depth chart you can use to plan a session before you travel.

Diamond Lake depth chart: 12 depth bands to 64 ft

Data: Michigan DNR Inland Lake Contours (public record), retrieved August 2026 · depths change over time · not for navigation

Diamond Lake depth chart data
Depth contour	Share of mapped area inside it
5 ft	about 100%
10 ft	about 64%
20 ft	about 37%
30 ft	about 30%
40 ft	about 24%
50 ft	about 12%
60 ft	about 7%

Share of the surveyed surface area enclosed by each depth contour, computed from the Michigan DNR Inland Lake Contours data.

How to fish Diamond Lake: deep, two-story water

At 64 feet, this is a two-story fishery: warm-water species work the shallows and weed edges while the deep basin can hold cold-water fish below the summer thermocline. In summer, target the transition where the bottom breaks from the shallow shelf toward the basin; fish suspend along that edge at dawn and dusk. The 12 mapped depth bands make it straightforward to find those breaks before you launch.

Ice fishing on Diamond Lake

On deep water like Diamond Lake, the winter bite concentrates along the first major drop-off rather than the deepest basin. Use the contours above to find where the shallow shelf breaks toward deep water and set up on that edge; panfish and walleye slide up and down it through the day. Late ice often pushes fish shallower again. Always verify ice thickness locally before walking out, and remember deep lakes freeze later and less evenly than shallow ones.

Diamond Lake depth map FAQs

How deep is Diamond Lake?: Diamond Lake reaches a maximum depth of 64 feet, according to the Michigan DNR Inland Lake Contours survey. Most of the lake is shallower, with 12 mapped depth bands between the shoreline and the deepest hole.
Where is the deepest part of Diamond Lake?: The deepest surveyed water on Diamond Lake sits toward the northeastern corner of the lake, inside the 64 ft contour. The interactive depth map above shows the full basin outline and the breaks leading into it.
How accurate is this Diamond Lake depth map?: The contours come from the Michigan DNR Inland Lake Contours survey. 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.

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