7 miles west of Sandstone
Pine County, Minnesota · 46.1220° N, 93.0076° W
Directions to Grindstone Lake Public Water Access SiteApple Maps
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Updated 15 Oct 2026, 5:20 pm EDT.
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Minnesota DNR lake survey, fetched 15 Oct 2026. Not for navigation.
1 public access site on Grindstone Lake.
Minnesota DNR public water accesses, fetched 15 Oct 2026.
Minnesota DNR stocking reports list 49 stockings of Grindstone Lake in 10 of the years 2016 to 2025. The most recent, in 2025, included 977 brook trout adults. Species stocked: brook trout, brown trout, lake trout, rainbow trout, splake.
Latest: 2025: 9,000 rainbow trout yearlings.
Source: Minnesota DNR Fisheries (LakeFinder stocking reports), fetched 15 Oct 2026. How we measure
Measured from Minnesota DNR contours. How we measure
Minnesota DNR’s latest standard fish survey of Grindstone Lake was in June 2025: 27 gill nets and 9 trap nets caught 16 species. The DNR also ran a targeted survey in August 2025; this section uses the latest standard survey.
Northern pike per gill net, standard surveys: 2002 1.0 · 2007 1.5 · 2012 0.8 · 2016 0.8 · 2025 1.6
Bluegill per trap net, standard surveys: 2002 11 · 2007 5.4 · 2012 28 · 2016 18 · 2025 12
Northern pike: 45 measured, 16 to 33 in, half 21 in or longer; average 2.5 lb, normal (normal 1.5–3.2 lb).
Largemouth bass: 69 measured, 3 to 18 in, half 8 in or longer; average 0.96 lb, normal (normal 0.5–1.2 lb).
Smallmouth bass: 101 measured, 4 to 18 in, half 6 in or longer; average 2.1 lb, above normal (normal 0.8–1.8 lb).
Black crappie: 19 measured, 4 to 11 in, half 8 in or longer; average 0.38 lb, normal (normal 0.3–0.5 lb).
Bluegill: 111 measured, 3 to 8 in, half 5 in or longer; average 0.12 lb, normal (normal 0.1–0.2 lb).
Also caught: brown trout, golden redhorse, greater redhorse, rainbow smelt, rainbow trout, river redhorse, shorthead redhorse, white sucker.
Source: Minnesota DNR Fisheries lake survey, 13 Jun 2025, via LakeFinder, fetched 15 Oct 2026. Normal range: DNR’s range for lakes of the same class (43 classes, grouped by water chemistry and shape). Each line has its own scale. How we measure
Measured water clarity averages about 11 ft: the Secchi depth across 5 readings, 2007–2025.
Minnesota Pollution Control Agency and volunteer Secchi readings, via Minnesota DNR LakeFinder, fetched 15 Oct 2026.
Minnesota DNR lake survey; straight-line miles.
Grindstone Lake is 153 feet at its deepest point, measured by Minnesota DNR survey. It covers 533 acres.
Yes. 1 public access site is listed: Grindstone Lake Public Water Access Site.
Yes. Minnesota DNR stocking reports list 49 stockings of it in 10 of the years 2016 to 2025. The most recent, in 2025, included 977 brook trout adults.
Minnesota DNR’s June 2025 standard survey caught 16 species, most often bluegill, northern pike, rock bass and black crappie.
About 88% of the lake's area is deeper than 10 feet, measured from Minnesota DNR depth contours.