Montcalm County · Michigan

Crystal Lake

Soundings in feet · 709 acres · deepest 70 ft

Today on the lake

Updated 9 Oct 2026, 3:18 am EDT. Get alerts for Crystal Lake

WEATHEROvernight: mostly clear, 41°F, wind WSW 3 mph. Friday: sunny, 69°F, wind WSW 6 mph.

WARNINGSNo weather or fire warnings in effect.

FIRENo wildfires or prescribed burns reported within 25 miles.

BURNINGCampfires and debris burning: check today's status with Michigan DNR.

ALGAECAUTION Satellite detected cyanobacteria across about 14% of the lake on 5 Oct 2026, the latest clear-sky image.

LAUNCHESCrystal Lake North: listed open. Michigan DNR record updated 3 Apr 2026.

National Weather Service; National Interagency Fire Center; U.S. EPA CyAN satellite; Michigan DHHS; Michigan DNR. Weather, warnings, fires and satellite refresh when you open the page (checked at most hourly).

Depth map

14 contours, 5 to 70 ft

0510152024253035404550536070feet

Michigan DNR survey, fetched 7 Oct 2026. Not for navigation.

Size and depth

709 acres · deepest 70 ft (measured) · shoreline about 5.1 mi · clarity about 9 ft

Crystal Lake is the largest of the 113 named lakes of 10 acres or more in Montcalm County. By Michigan DNR survey it is the 2nd deepest of the 24 with a measured depth. Its water is clearer than 41 of the other 97 lakes in the county with satellite clarity readings. Its shoreline measures about 5.1 miles along the state outline. About 15% of its area is deeper than 30 ft.

Ranks against Montcalm County lakes in Michigan hydrography, Michigan DNR lake surveys and Michigan EGLE satellite clarity; shoreline measured from the state outline. How we measure

Getting on the water

1 public access site on Crystal Lake.

Crystal Lake North · Open

3 ramp lanes · 47 trailer spaces · vault toilet · Recreation Passport required

Local boating rules, Montcalm County

Michigan DNR boating access, fetched 7 Oct 2026.

Fishing

Michigan DNR has stocked Crystal Lake 36 times since 1979. The most recent stocking was 499,500 walleye on 29 April 2026. Species stocked: walleye.

36 stockings, 1979 to 2026, log scale

Latest: 29 Apr 2026: 499,500 walleye.

29 Apr 2026STOCKED499,500 walleye

6 Nov 2025STOCKED1,016 walleye

30 Oct 2025STOCKED3,481 walleye

4 Jun 2024STOCKED36,330 walleye

1 Jun 2022STOCKED36,269 walleye

6 Oct 2017STOCKED184 walleye

Source: Michigan DNR Fisheries, fetched 7 Oct 2026. How we measure

Where the deep water is

Show water deeper than

Measured from Michigan DNR contours. How we measure

Historically recorded species, from records through 1946: northern longear sunfish. Historic records, not a current survey.

Michigan Fish Atlas.

Water quality

Average water clarity is about 9 ft (Secchi depth 2.7 m, satellite readings 2018–23).

Clarity 8.8 ft of 70 ft

Michigan EGLE satellite clarity, fetched 7 Oct 2026.

CAUTION The highest toxin level measured here was microcystin at 188.9 ppb on 1 September 2026, 24 times the EPA swimming guideline of 8 ppb. 2 water samples are on record, the latest from 29 September 2026. Check current advisories before swimming.

Source: Michigan DHHS harmful algal bloom sampling; U.S. EPA 2019 recreational criteria. Fetched 7 Oct 2026.

Email me about Crystal LakeWhen it is stockedMichigan DNR has stocked Crystal Lake 36 times since 1979, most recently 499,500 walleye on 29 April 2026. 1 stocking so far in 2026.When algae is reported or testedMichigan DHHS lists 0 bloom reports and 2 water samples here. 2 records in 2026, the latest on 29 Sep 2026.When satellite sees a bloom startEPA satellite, checked daily, June to October. We email when a bloom first shows on two clear days, not every day it stays. It has not happened in 2026.Any lake in Montcalm CountyStockings and algae records on every lake in the county. In 2026 so far: 7 emails.

In 2026 so far, these alerts would have sent you 3 emails about Crystal Lake: 29 Apr, 1 Sep and 29 Sep.

Email address

At most one email a week per lake. We email you a link to confirm before any alert is sent; every email has a one-click unsubscribe.

Nearby lakes with measured depth

Mud Lake0 ft deep · 1.1 mi · Montcalm County

Loon Lake53 ft deep · 1.7 mi · Montcalm County

Duck Lake9 ft deep · 2.6 mi · Montcalm County

Holland Lake48 ft deep · 6.1 mi · Montcalm County

Half Moon Lake48 ft deep · 6.6 mi · Montcalm County

Pearl Lake56 ft deep · 8.1 mi · Montcalm County

Michigan DNR survey; straight-line miles.

Common questions

How deep is Crystal Lake?

Crystal Lake is 70 feet at its deepest point, measured by Michigan DNR survey. It covers 709 acres.

Is there a public boat launch on Crystal Lake?

Yes. 1 public access site is listed: Crystal Lake North.

Is Crystal Lake stocked with fish?

Yes. Michigan DNR has stocked it 36 times since 1979, most recently 499,500 walleye on 29 April 2026.

How much of Crystal Lake is deeper than 10 feet?

About 43% of the lake's area is deeper than 10 feet, measured from Michigan DNR depth contours.

Has Crystal Lake had toxic algae?

The highest toxin level measured was microcystin at 188.9 ppb (1 September 2026). Check current advisories before swimming.