4 miles north of Pentwater
Mason County, Michigan · 43.8291° N, 86.4134° W
One of 38 lakes named Bass Lake in Michigan. See them all
The Michigan DNR lists no public access site on Bass Lake; much of the shore may be private.
Updated 10 Oct 2026, 1:19 am EDT. Get alerts for Bass 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.
496 acres · deepest 4 ft (measured) · shoreline about 4.7 mi · clarity about 10 ft
Bass Lake is the 5th largest of the 47 named lakes of 10 acres or more in Mason County. By Michigan DNR survey it is the 19th deepest of the 19 with a measured depth. Its water is clearer than 20 of the other 40 lakes in the county with satellite clarity readings. Its shoreline measures about 4.7 miles along the state outline. About 0% of its area is deeper than 2 ft.
Ranks against Mason County lakes in Michigan hydrography, Michigan DNR lake surveys and Michigan EGLE satellite clarity; shoreline measured from the state outline. How we measure
Michigan DNR has stocked Bass Lake 3 times since 1979. The most recent stocking was 2,100 tiger muskellunge on 6 August 1982. Species stocked: tiger muskellunge.
Latest: 6 Aug 1982: 2,100 tiger muskellunge.
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 1932: black crappie, blackchin shiner, bluegill, bluntnose minnow, bowfin, brook stickleback, creek chub, golden shiner, johnny darter, largemouth bass, mottled sculpin, pumpkinseed, rock bass, sand shiner, tadpole madtom, western banded killifish, white crappie, white sucker, yellow perch. Historic records, not a current survey.
Michigan Fish Atlas.
Average water clarity is about 10 ft (Secchi depth 3.1 m, satellite readings 2018–23).
Michigan EGLE satellite clarity, fetched 7 Oct 2026.
CAUTION Algal blooms were reported on Bass Lake on 16 August 2026; they were not tested for toxins. The highest toxin level measured here was microcystin at 582.7 ppb on 7 September 2022, 73 times the EPA swimming guideline of 8 ppb. 7 water samples are on record, the latest from 12 August 2024. Check current advisories before swimming.
Source: Michigan DHHS harmful algal bloom sampling; U.S. EPA 2019 recreational criteria. Fetched 7 Oct 2026.
7 other lakes of 10+ acres within about 6 miles of Bass Lake. Sources: Michigan DNR, US Census Bureau.
Michigan DNR survey; straight-line miles.
Bass Lake is 4 feet at its deepest point, measured by Michigan DNR survey. It covers 496 acres.
Yes. Michigan DNR has stocked it 3 times since 1979, most recently 2,100 tiger muskellunge on 6 August 1982.
Algal blooms were reported on 16 August 2026 and were not tested. The highest toxin level measured was microcystin at 582.7 ppb (7 September 2022). Check current advisories before swimming.