How deep is Cooley Lake?

Cooley Lake reaches a maximum depth of 56 feet in the Michigan DNR Inland Lake Contours survey. Most of it is far shallower: the survey charts 8 closed depth contours over about 84 acres, and half of that water sits inside the 10 ft line.

Where is the deepest part of Cooley Lake?

The deepest charted water on Cooley Lake lies inside the 56 ft contour, toward the southeastern corner of the lake. That contour encloses under an acre, under 1% 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 Cooley Lake is shallower than 10 feet?

About half. The 10 ft contour encloses 38 acres of the roughly 84 acres inside the outer 5 ft line, so the other half of the water is shallower than 10 feet. The sharpest drop is between 5 and 10 feet, where the mapped water sheds 46 acres.

How accurate is this Cooley 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.

Michigan lake depth maps

Cooley Lake depth map

Cooley Lake in Oakland County, Michigan reaches a depth of 56 feet. Cooley Lake is charted here across 8 closed depth contours, from the 5 ft line down to 56 ft, enclosing about 84 acres of water. Half of that water lies inside the 10 ft line, and only under an acre 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 August 19, 2026

Cooley Lake depth chart: 8 depth contours from 5 to 56 ft

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

Cooley Lake depth chart data: water enclosed by each contour
Depth contour	Water inside it	Share of mapped water
5 ft	84 acres	100%
10 ft	38 acres	46%
15 ft	30 acres	35%
20 ft	23 acres	27%
30 ft	12 acres	15%
40 ft	5.6 acres	6.6%
50 ft	under 1 acre	under 1%
56 ft	under 1 acre	under 1%

Acreages are computed from the closed Michigan DNR Inland Lake Contours contour rings, with islands subtracted. Shares are of the 84 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.

Fishing Cooley Lake: a broad shallow flat

About 84 acres of Cooley Lake sit inside the survey's 5 ft contour, and half of that water is already gone by the 10 ft line: most of this Oakland County water is shallow and the depth is concentrated in one part of the basin. The steepest break on the chart runs from 5 down to 10 ft: 46 acres of bottom fall away across 5 ft there, which makes that band the first contour to work. The 56 ft contour, toward the southeastern corner of the lake, encloses under an acre of water, a single pocket rather than a basin, but one worth a drift over in high summer. With 56 ft at its deepest there is no true cold-water layer here, so structure does the work the thermocline does elsewhere: fish the points and inside turns where the 5 and 10 ft lines pinch together, hardest in early season and again as fish follow bait back down in autumn.

Ice fishing on Cooley Lake

Cooley Lake's 56 ft is a workable ice depth, enough water to hold fish all winter, without the slow freeze-up of a big basin. First light belongs on the 56 ft hole, all 0.1 acres of it; as the sun gets up, move onto the 5–10 ft break, and spend the middle of the day on the flats inside the 10 ft line. Check ice thickness locally before you walk out.

Cooley Lake depth map FAQs

How deep is Cooley Lake?: Cooley Lake reaches a maximum depth of 56 feet in the Michigan DNR Inland Lake Contours survey. Most of it is far shallower: the survey charts 8 closed depth contours over about 84 acres, and half of that water sits inside the 10 ft line.
Where is the deepest part of Cooley Lake?: The deepest charted water on Cooley Lake lies inside the 56 ft contour, toward the southeastern corner of the lake. That contour encloses under an acre, under 1% 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 Cooley Lake is shallower than 10 feet?: About half. The 10 ft contour encloses 38 acres of the roughly 84 acres inside the outer 5 ft line, so the other half of the water is shallower than 10 feet. The sharpest drop is between 5 and 10 feet, where the mapped water sheds 46 acres.
How accurate is this Cooley 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 Cooley Lake

Union Lake depth map · 110 ft max · 1 mi away
Cedar Island Lake depth map · 72 ft max · 2 mi away
Oxbow Lake depth map · 72+ ft max · 2 mi away
Green Lake depth map · 72 ft max · 3 mi away
Middle Straits Lake depth map · 55 ft max · 3 mi away

Mapped fishing venues near Cooley Lake

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

Union Lake · 1 mi away
Cedar Island Lake · 2 mi away
Oxbow Lake · 2 mi away

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