How deep is Crystal Lake?

Crystal Lake is more than 175 feet deep. The deepest contour in the Michigan DNR Inland Lake Contours survey is the 175 foot line, and the lake continues deeper inside it.

Where is the deepest part of Crystal Lake?

The deepest charted water on Crystal Lake lies inside the 175 ft contour, toward the middle of the lake. That contour encloses under an acre, 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 Crystal Lake is shallower than 70 feet?

About half. The 70 ft contour encloses 3,886 acres of the roughly 8,309 acres inside the outer 10 ft line, so the other half of the water is shallower than 70 feet. The sharpest drop is between 20 and 30 feet, where the mapped water sheds 1,514 acres.

How accurate is this Crystal 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

Crystal Lake depth map

Crystal Lake in Benzie County, Michigan reaches a depth of more than 175 feet at its deepest surveyed contour. Crystal Lake is charted here across 10 closed depth contours, from the 10 ft line down to 175 ft, enclosing about 8,309 acres of water. Half of that water lies inside the 70 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

Crystal Lake depth chart: 10 depth contours from 10 to 175 ft

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

Crystal Lake depth chart data: water enclosed by each contour
Depth contour	Water inside it	Share of mapped water
10 ft	8,309 acres	100%
20 ft	7,654 acres	92%
30 ft	6,140 acres	74%
50 ft	5,290 acres	64%
70 ft	3,886 acres	47%
90 ft	3,432 acres	41%
120 ft	2,754 acres	33%
140 ft	2,132 acres	26%
160 ft	581 acres	7%
175 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 8,309 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 Crystal Lake: a stepped drop into deep water

Inside its outermost 10 ft contour the survey charts about 8,309 acres of Crystal Lake, with the 70 ft line enclosing half of it, so the bottom steps down contour by contour into the deep basin rather than shelving flat or plunging all at once. The sharpest change on the chart is between 20 and 30 ft, where the mapped water loses 1,514 acres in 10 ft of depth, that band is the contour to work first, because it is where the bottom stops being flat. The 175 ft contour, toward the middle 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. At 175 ft this is two-story water: the basin can stay cold below the summer thermocline while warm-water fish stay up on the 10-to-70 ft ground, and the fish that move between the two do it along the 20–30 ft break at first and last light.

Ice fishing on Crystal Lake

Deep water like Crystal Lake freezes later and less evenly than the shallow lakes around it, and the winter bite sets up on the first real break, not out over the 175 ft hole. That edge is the 20–30 ft band on the chart above, where 1,514 acres of bottom tilt away, and panfish and walleye work up and down it through the day. By late ice the fish push back onto the 10-to-70 ft flat. Check ice thickness locally before you walk out.

Crystal Lake depth map FAQs

How deep is Crystal Lake?: Crystal Lake is more than 175 feet deep. The deepest contour in the Michigan DNR Inland Lake Contours survey is the 175 foot line, and the lake continues deeper inside it.
Where is the deepest part of Crystal Lake?: The deepest charted water on Crystal Lake lies inside the 175 ft contour, toward the middle of the lake. That contour encloses under an acre, 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 Crystal Lake is shallower than 70 feet?: About half. The 70 ft contour encloses 3,886 acres of the roughly 8,309 acres inside the outer 10 ft line, so the other half of the water is shallower than 70 feet. The sharpest drop is between 20 and 30 feet, where the mapped water sheds 1,514 acres.
How accurate is this Crystal 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 Crystal Lake

Platte Lake depth map · 90+ ft max · 4 mi away
Lake Ann depth map · 75 ft max · 16 mi away
Glen Lake depth map · 130 ft max · 17 mi away
Cedar Hedge Lake depth map · 69 ft max · 19 mi away
Green Lake depth map · 102 ft max · 19 mi away

Mapped fishing venues near Crystal Lake

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

Platte Lake · 4 mi away
Lake Ann · 16 mi away
Herendeene Lake · 16 mi away

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