How deep is Birch Lake?

Birch Lake is more than 80 feet deep. The deepest contour in the Michigan DNR Inland Lake Contours survey is the 80 foot line, and the lake continues deeper inside it, with 10 depth bands mapped in total.

Where is the deepest part of Birch Lake?

The deepest surveyed water on Birch Lake sits toward the middle of the lake, inside the 80 ft contour. The interactive depth map above shows the full basin outline and the breaks leading into it.

How accurate is this Birch 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

Birch Lake depth map

Birch Lake in Cass County, Michigan reaches a depth of more than 80 feet at its deepest surveyed contour. The official Michigan survey maps 10 depth bands across 12 contour lines. This free map of Birch Lake shows every surveyed contour as an interactive depth chart you can use to plan a session before you travel.

Birch Lake depth chart: 10 depth bands to 80+ ft

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

Birch Lake depth chart data
Depth contour	Share of mapped area inside it
5 ft	about 100%
10 ft	about 42%
20 ft	about 39%
30 ft	about 35%
40 ft	about 30%
50 ft	about 24%
60 ft	about 17%
70 ft	about 12%
80 ft	about 9%

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

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

At 80 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 10 mapped depth bands make it straightforward to find those breaks before you launch.

Ice fishing on Birch Lake

On deep water like Birch 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.

Birch Lake depth map FAQs

How deep is Birch Lake?: Birch Lake is more than 80 feet deep. The deepest contour in the Michigan DNR Inland Lake Contours survey is the 80 foot line, and the lake continues deeper inside it, with 10 depth bands mapped in total.
Where is the deepest part of Birch Lake?: The deepest surveyed water on Birch Lake sits toward the middle of the lake, inside the 80 ft contour. The interactive depth map above shows the full basin outline and the breaks leading into it.
How accurate is this Birch 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 Birch Lake

Shavehead Lake depth map · 70+ ft max · 2 mi away
Donnell Lake depth map · 60+ ft max · 3 mi away
Diamond Lake depth map · 64 ft max · 6 mi away
Corey Lake depth map · 70+ ft max · 7 mi away
Baldwins Lake depth map · 55+ ft max · 7 mi away

Mapped fishing venues near Birch Lake

Birch Lake in the venue directory covers access and fishing details for this water.

Shavehead Lake · 2 mi away
Donnell Lake · 3 mi away
Diamond Lake · 6 mi away

Fishing in Michigan needs a state license: Michigan fishing license guide · all Michigan venues