How deep is Crystal Lake?

Crystal Lake reaches a maximum depth of 70 feet in the Michigan DNR Inland Lake Contours survey. Most of it is far shallower: the survey charts 12 closed depth contours over about 703 acres, and half of that water sits inside the 15 ft line.

Where is the deepest part of Crystal Lake?

The deepest charted water on Crystal Lake lies inside the 70 ft contour, toward the southern end 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 15 feet?

About half. The 15 ft contour encloses 279 acres of the roughly 703 acres inside the outer 5 ft line, so the other half of the water is shallower than 15 feet. The sharpest drop is between 5 and 10 feet, where the mapped water sheds 228 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 Montcalm County, Michigan reaches a depth of 70 feet. Crystal Lake is charted here across 12 closed depth contours, from the 5 ft line down to 70 ft, enclosing about 703 acres of water. Half of that water lies inside the 15 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: 12 depth contours from 5 to 70 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
5 ft	703 acres	100%
10 ft	475 acres	68%
15 ft	279 acres	40%
20 ft	260 acres	37%
25 ft	216 acres	31%
30 ft	168 acres	24%
35 ft	100 acres	14%
40 ft	47 acres	6.6%
45 ft	14 acres	2%
50 ft	8.3 acres	1.2%
60 ft	1.6 acres	under 1%
70 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 703 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 Crystal Lake: a wide shallow flat over a deep hole

Inside its outermost 5 ft contour the survey charts about 703 acres of Crystal Lake, with the 15 ft line enclosing half of it, so the bulk of this Montcalm County water sits on a shallow flat, with the real depth packed into one part of the basin. The sharpest change on the chart is between 5 and 10 ft, where the mapped water loses 228 acres in 5 ft of depth, that band is the contour to work first, because it is where the bottom stops being flat. Inside the 70 ft contour there is under an acre of water, toward the southern end of the lake: a single pocket rather than a basin, and worth a drift over in high summer. 70 ft of water makes this a two-story fishery: warm-water fish hold the 5-to-15 ft ground while the basin can stay cold below the summer thermocline, and the traffic between the two runs along the 5–10 ft break at first and last light.

Ice fishing on Crystal Lake

Crystal 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 70 ft hole. The 5–10 ft band on the chart above is that edge: 228 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 5-to-15 ft flat. Check ice thickness locally before you walk out.

Crystal Lake depth map FAQs

How deep is Crystal Lake?: Crystal Lake reaches a maximum depth of 70 feet in the Michigan DNR Inland Lake Contours survey. Most of it is far shallower: the survey charts 12 closed depth contours over about 703 acres, and half of that water sits inside the 15 ft line.
Where is the deepest part of Crystal Lake?: The deepest charted water on Crystal Lake lies inside the 70 ft contour, toward the southern end 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 15 feet?: About half. The 15 ft contour encloses 279 acres of the roughly 703 acres inside the outer 5 ft line, so the other half of the water is shallower than 15 feet. The sharpest drop is between 5 and 10 feet, where the mapped water sheds 228 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

Derby Lake depth map · 87 ft max · 10 mi away
Winfield Lake depth map · 57+ ft max · 23 mi away
Scram Lake depth map · 85 ft max · 25 mi away
Coldwater Lake depth map · 65+ ft max · 28 mi away
Baptist Lake depth map · 65+ ft max · 33 mi away

Mapped fishing venues near Crystal Lake

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

Duck Lake · 3 mi away
North Pier · 3 mi away
Perch Pond · 3 mi away

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