Tallman Lake, Mason County, MI: Depth Map, Fishing & Water Quality

Where it is

6 miles southeast of Fountain

Mason County, Michigan · 43.9895° N, 86.1050° W

Directions open in Google or Apple Maps, to the Michigan DNR public access site.

Today on the lake

Updated 10 Oct 2026, 12:22 am EDT. Get alerts for Tallman Lake

WEATHEROvernight: slight chance rain showers, 54°F, wind SE 6 to 9 mph. Saturday: mostly sunny, 77°F, wind SSE 9 to 13 mph.

WARNINGSNo weather or fire warnings in effect.

FIREPrescribed burn Boreman Ranch RX, 42 acres, 19.6 mi away, began 9 Oct 2026. A planned fire set by land managers.

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

ALGAEToo small for satellite monitoring (under 1 km²). No bloom reports on record with Michigan DHHS.

LAUNCHESTallman Lake: 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

1 contours, 5 to 5 ft

05feet

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

Size and depth

162 acres · deepest 5 ft (measured) · shoreline about 2.3 mi · clarity about 2 ft

Tallman Lake is the 8th largest of the 47 named lakes of 10 acres or more in Mason County. By Michigan DNR survey it is the 17th deepest of the 19 with a measured depth. Its water is clearer than 2 of the other 40 lakes in the county with satellite clarity readings. Its shoreline measures about 2.3 miles along the state outline.

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

Getting on the water

1 public access site on Tallman Lake.

Tallman Lake · Open

1 ramp lane · 5 trailer spaces · Recreation Passport required

Local boating rules, Mason County

Michigan DNR boating access, fetched 7 Oct 2026.

Water quality

Average water clarity is about 2 ft (Secchi depth 0.8 m, satellite readings 2018–23).

Clarity 2.5 ft of 5 ft

Michigan EGLE satellite clarity, fetched 7 Oct 2026.

The area around Tallman Lake

28 other lakes of 10+ acres within about 7 miles of Tallman Lake; 1 public launch in magenta. Sources: Michigan DNR, US Census Bureau.

Nearby lakes with measured depth

Round Lake10 ft deep · 1.4 mi · Mason County

Gooseneck Lake15 ft deep · 1.6 mi · Mason County

Gooseneck Lake20 ft deep · 1.7 mi · Mason County

Long Lake50 ft deep · 2.7 mi · Mason County

Emerson Lake45 ft deep · 3.0 mi · Mason County

Picnic Lake20 ft deep · 3.4 mi · Mason County

Michigan DNR survey; straight-line miles.

Common questions

How deep is Tallman Lake?

Tallman Lake is 5 feet at its deepest point, measured by Michigan DNR survey. It covers 162 acres.

Is there a public boat launch on Tallman Lake?

Yes. 1 public access site is listed: Tallman Lake.