Updated 9 Oct 2026, 2:57 am EDT. Get alerts for Triangle Lake
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Michigan DNR survey, fetched 7 Oct 2026. Not for navigation.
173 acres · deepest 30 ft (measured) · shoreline about 2.8 mi · clarity about 12 ft
Triangle Lake is the 26th largest of the 168 named lakes of 10 acres or more in Schoolcraft County. By Michigan DNR survey it is the 30th deepest of the 83 with a measured depth. Its water is clearer than 103 of the other 124 lakes in the county with satellite clarity readings. Its shoreline measures about 2.8 miles along the state outline. About 30% of its area is deeper than 15 ft.
Ranks against Schoolcraft County lakes in Michigan hydrography, Michigan DNR lake surveys and Michigan EGLE satellite clarity; shoreline measured from the state outline. How we measure
Average water clarity is about 12 ft (Secchi depth 3.7 m, satellite readings 2018–23).
Michigan EGLE satellite clarity, fetched 7 Oct 2026.
Michigan DNR survey; straight-line miles.
Triangle Lake is 30 feet at its deepest point, measured by Michigan DNR survey. It covers 173 acres.
About 50% of the lake's area is deeper than 10 feet, measured from Michigan DNR depth contours.