Updated 9 Oct 2026, 3:19 am EDT. Get alerts for Mona Lake
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).
Michigan DNR survey, fetched 7 Oct 2026. Not for navigation.
656 acres · deepest 42 ft (measured) · shoreline about 13.6 mi · clarity about 4 ft
Mona Lake is the 5th largest of the 54 named lakes of 10 acres or more in Muskegon County. By Michigan DNR survey it is the 3rd deepest of the 6 with a measured depth. Its water is clearer than 9 of the other 39 lakes in the county with satellite clarity readings. Its shoreline measures about 13.6 miles along the state outline. About 6% of its area is deeper than 30 ft.
Ranks against Muskegon County lakes in Michigan hydrography, Michigan DNR lake surveys and Michigan EGLE satellite clarity; shoreline measured from the state outline. How we measure
1 public access site on Mona Lake.
Michigan DNR boating access, fetched 7 Oct 2026.
Michigan DNR has stocked Mona Lake 32 times since 1980. The most recent stocking was 35,520 walleye on 9 June 2026. Species stocked: muskellunge, tiger muskellunge, walleye.
Latest: 9 Jun 2026: 35,520 walleye.
Source: Michigan DNR Fisheries, fetched 7 Oct 2026. How we measure
Measured from Michigan DNR contours. How we measure
Historically recorded species, from records through 1956: black bullhead, black crappie, bluegill, bluntnose minnow, bowfin, brook silverside, emerald shiner, golden shiner, johnny darter, lake chubsucker, largemouth bass, longnose gar, northern logperch, northern pike, quillback, smallmouth bass, spottail shiner, spotted gar, warmouth, western banded killifish, white sucker, yellow bullhead, yellow perch. Historic records, not a current survey.
Michigan Fish Atlas.
Average water clarity is about 4 ft (Secchi depth 1.1 m, satellite readings 2018–23).
Michigan EGLE satellite clarity, fetched 7 Oct 2026.
CAUTION Algal blooms were reported on Mona Lake on 8 August 2026 and 13 August 2026; they were not tested for toxins. The highest toxin level measured here was microcystin at 61.7 ppb on 1 July 2024, 8 times the EPA swimming guideline of 8 ppb. 7 water samples are on record, the latest from 22 July 2025. Check current advisories before swimming.
Source: Michigan DHHS harmful algal bloom sampling; U.S. EPA 2019 recreational criteria. Fetched 7 Oct 2026.
Michigan DNR survey; straight-line miles.
Mona Lake is 42 feet at its deepest point, measured by Michigan DNR survey. It covers 656 acres.
Yes. 1 public access site is listed: Mona Lake Park.
Yes. Michigan DNR has stocked it 32 times since 1980, most recently 35,520 walleye on 9 June 2026.
About 63% of the lake's area is deeper than 10 feet, measured from Michigan DNR depth contours.
Algal blooms were reported on 8 August 2026, 13 August 2026 and were not tested. The highest toxin level measured was microcystin at 61.7 ppb (1 July 2024). Check current advisories before swimming.