6 miles north of Mecosta
Mecosta County, Michigan · 43.6971° N, 85.2604° W
Directions to Jehnsen LakeApple Maps
Directions open in Google or Apple Maps, to the Michigan DNR public access site.
Updated 10 Oct 2026, 12:23 am EDT. Get alerts for Jehnsen 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.
316 acres · deepest 18 ft (measured) · shoreline about 5.6 mi · clarity about 10 ft
Jehnsen Lake is the 6th largest of the 71 named lakes of 10 acres or more in Mecosta County. By Michigan DNR survey it is the 23rd deepest of the 26 with a measured depth. Its water is clearer than 18 of the other 56 lakes in the county with satellite clarity readings. Its shoreline measures about 5.6 miles along the state outline. About 0% of its area is deeper than 8 ft.
Ranks against Mecosta 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 Jehnsen Lake.
Michigan DNR boating access, fetched 7 Oct 2026.
Average water clarity is about 10 ft (Secchi depth 3.0 m, satellite readings 2018–23).
Michigan EGLE satellite clarity, fetched 7 Oct 2026.
58 other lakes of 10+ acres within about 9 miles of Jehnsen Lake, 5 with a page here (darker blue); 1 public launch in magenta. Sources: Michigan DNR, US Census Bureau.
Michigan DNR survey; straight-line miles.
Jehnsen Lake is 18 feet at its deepest point, measured by Michigan DNR survey. It covers 316 acres.
Yes. 1 public access site is listed: Jehnsen Lake.
About 2% of the lake's area is deeper than 10 feet, measured from Michigan DNR depth contours.