How deep is Platte Lake?

Platte Lake is more than 90 feet deep. The deepest contour in the Michigan DNR Inland Lake Contours survey is the 90 foot line, and the lake continues deeper inside it.

Where is the deepest part of Platte Lake?

The deepest charted water on Platte Lake lies inside the 90 ft contour, toward the northwestern corner of the lake. That contour encloses 1.1 acres, under 1% 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 Platte Lake is shallower than 40 feet?

About half. The 40 ft contour encloses 627 acres of the roughly 1,572 acres inside the outer 10 ft line, so the other half of the water is shallower than 40 feet. The sharpest drop is between 30 and 40 feet, where the mapped water sheds 441 acres.

How accurate is this Platte 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

Platte Lake depth map

Platte Lake in Benzie County, Michigan reaches a depth of more than 90 feet at its deepest surveyed contour. Platte Lake is charted here across 9 closed depth contours, from the 10 ft line down to 90 ft, enclosing about 1,572 acres of water. Half of that water lies inside the 40 ft line, and only 1.1 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 August 19, 2026

Platte Lake depth chart: 9 depth contours from 10 to 90 ft

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

Platte Lake depth chart data: water enclosed by each contour
Depth contour	Water inside it	Share of mapped water
10 ft	1,572 acres	100%
20 ft	1,297 acres	83%
30 ft	1,068 acres	68%
40 ft	627 acres	40%
50 ft	408 acres	26%
60 ft	275 acres	18%
70 ft	87 acres	5.5%
80 ft	31 acres	1.9%
90 ft	1.1 acres	under 1%

Acreages are computed from the closed Michigan DNR Inland Lake Contours contour rings, with islands subtracted. Shares are of the 1,572 acres inside the outermost charted contour (the 10 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 Platte Lake: a stepped drop into deep water

Inside its outermost 10 ft contour the survey charts about 1,572 acres of Platte Lake, with the 40 ft line enclosing half of it, so the drop to the deep basin comes in stages, each contour giving up another slice of water, rather than in one abrupt wall. The sharpest change on the chart is between 30 and 40 ft, where the mapped water loses 441 acres in 10 ft of depth, that band is the contour to work first, because it is where the bottom stops being flat. The deepest 90 ft contour holds 1.1 acres, under 1% of the mapped water, toward the northwestern corner of the lake. 90 ft of water makes this a two-story fishery: warm-water fish hold the 10-to-40 ft ground while the basin can stay cold below the summer thermocline, and the traffic between the two runs along the 30–40 ft break at first and last light.

Ice fishing on Platte Lake

Platte 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 90 ft hole. The 30–40 ft band on the chart above is that edge: 441 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 10-to-40 ft flat. Check ice thickness locally before you walk out.

Platte Lake depth map FAQs

How deep is Platte Lake?: Platte Lake is more than 90 feet deep. The deepest contour in the Michigan DNR Inland Lake Contours survey is the 90 foot line, and the lake continues deeper inside it.
Where is the deepest part of Platte Lake?: The deepest charted water on Platte Lake lies inside the 90 ft contour, toward the northwestern corner of the lake. That contour encloses 1.1 acres, under 1% 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 Platte Lake is shallower than 40 feet?: About half. The 40 ft contour encloses 627 acres of the roughly 1,572 acres inside the outer 10 ft line, so the other half of the water is shallower than 40 feet. The sharpest drop is between 30 and 40 feet, where the mapped water sheds 441 acres.
How accurate is this Platte 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 Platte Lake

Crystal Lake depth map · 175+ ft max · 4 mi away
Lake Ann depth map · 75 ft max · 12 mi away
Glen Lake depth map · 130 ft max · 14 mi away
Cedar Hedge Lake depth map · 69 ft max · 15 mi away
Green Lake depth map · 102 ft max · 16 mi away

Mapped fishing venues near Platte Lake

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

Crystal Lake · 4 mi away
Herendeene Lake · 12 mi away
Lake Ann · 12 mi away

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