How deep is Heart Lake?

Heart Lake reaches a maximum depth of 123 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 Heart Lake?

The deepest surveyed water on Heart Lake sits toward the southeastern corner of the lake, inside the 123 ft contour. The interactive depth map above shows the full basin outline and the breaks leading into it.

How accurate is this Heart 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

Heart Lake depth map

Heart Lake in Otsego County, Michigan reaches a depth of 123 feet. The official Michigan survey maps 12 depth bands across 13 contour lines. This free map of Heart Lake shows every surveyed contour as an interactive depth chart you can use to plan a session before you travel.

Heart Lake depth chart: 12 depth bands to 123 ft

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

Heart Lake depth chart data
Depth contour	Share of mapped area inside it
10 ft	about 100%
20 ft	about 74%
30 ft	about 58%
40 ft	about 45%
50 ft	about 35%
60 ft	about 26%
70 ft	about 19%
80 ft	about 13%
90 ft	about 4%
100 ft	about 3%
110 ft	about 3%

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

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

At 123 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 Heart Lake

On deep water like Heart 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.

Heart Lake depth map FAQs

How deep is Heart Lake?: Heart Lake reaches a maximum depth of 123 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 Heart Lake?: The deepest surveyed water on Heart Lake sits toward the southeastern corner of the lake, inside the 123 ft contour. The interactive depth map above shows the full basin outline and the breaks leading into it.
How accurate is this Heart 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 Heart Lake

Big Bradford Lake depth map · 102 ft max · 2 mi away
Bridge Lake depth map · 87 ft max · 3 mi away
Big Chub Lake depth map · 74+ ft max · 3 mi away
Big Lake depth map · 81 ft max · 10 mi away
Blue Lake depth map · 80+ ft max · 11 mi away

Mapped fishing venues near Heart Lake

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

Big Bradford Lake · 2 mi away
Bridge Lake · 3 mi away
Big Chub Lake · 3 mi away

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