Jackson County · Michigan

Grass Lake

Soundings in feet · 353 acres · deepest 13 ft

Today on the lake

Updated 9 Oct 2026, 3:30 am EDT. Get alerts for Grass Lake

WEATHEROvernight: mostly clear, 42°F, wind WSW 2 mph. Friday: mostly sunny, 69°F, wind SW 3 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.

ALGAENo cyanobacteria detected by satellite on 6 Oct 2026, the latest clear-sky image.

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

7 contours, 3 to 13 ft

0345671013feet

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

Size and depth

353 acres · deepest 13 ft (measured) · shoreline about 4.4 mi · clarity about 6 ft

Grass Lake is the 9th largest of the 108 named lakes of 10 acres or more in Jackson County. By Michigan DNR survey it is the 34th deepest of the 40 with a measured depth. Its water is clearer than 9 of the other 92 lakes in the county with satellite clarity readings. Its shoreline measures about 4.4 miles along the state outline. About 0% of its area is deeper than 6 ft.

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

Fishing

Michigan DNR has stocked Grass Lake 5 times since 1980. The most recent stocking was 7,920 redear sunfish on 15 October 1992. Species stocked: redear sunfish, tiger muskellunge.

5 stockings, 1980 to 1992, log scale

Latest: 15 Oct 1992: 7,920 redear sunfish.

15 Oct 1992STOCKED7,920 redear sunfish

14 Oct 1992STOCKED19,800 redear sunfish

20 Aug 1991STOCKED18,100 redear sunfish

24 Sep 1987STOCKED35,000 redear sunfish

17 Sep 1980STOCKED1,000 tiger muskellunge

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 1995: central mudminnow, fathead minnow, redear sunfish. Historic records, not a current survey.

Michigan Fish Atlas.

Water quality

Average water clarity is about 6 ft (Secchi depth 1.7 m, satellite readings 2018–23).

Clarity 5.5 ft of 13 ft

Michigan EGLE satellite clarity, fetched 7 Oct 2026.

Email me about Grass LakeWhen it is stockedMichigan DNR has stocked Grass Lake 5 times since 1980, most recently 7,920 redear sunfish on 15 October 1992. None in the last five years.When algae is reported or testedMichigan DHHS has no records for this lake yet. We email when the first one is posted.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 Jackson CountyStockings and algae records on every lake in the county. In 2026 so far: 4 emails.

Grass Lake has had no stockings or algae records in 2026, so its own alerts would have sent nothing this year. The county alert is on by default.

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

Tims Lake22 ft deep · 1.3 mi · Jackson County

Welch Lake20 ft deep · 3.2 mi · Jackson County

Brill Lake27 ft deep · 4.5 mi · Jackson County

Little Wolf Lake50 ft deep · 4.7 mi · Jackson County

Wolf Lake45 ft deep · 5.0 mi · Jackson County

Pond Lily Lake7 ft deep · 5.0 mi · Jackson County

Michigan DNR survey; straight-line miles.

Common questions

How deep is Grass Lake?

Grass Lake is 13 feet at its deepest point, measured by Michigan DNR survey. It covers 353 acres.

Is Grass Lake stocked with fish?

Yes. Michigan DNR has stocked it 5 times since 1980, most recently 7,920 redear sunfish on 15 October 1992.

How much of Grass Lake is deeper than 10 feet?

About 1% of the lake's area is deeper than 10 feet, measured from Michigan DNR depth contours.