6 miles east of Hackensack
Cass County, Minnesota · 46.9102° N, 94.3831° W
The Minnesota DNR lists no public access site on Big Deep Lake; much of the shore may be private.
Updated 19 Oct 2026, 5:52 pm EDT.
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Minnesota DNR lake survey, fetched 15 Oct 2026. Not for navigation.
Minnesota DNR stocking reports list 2 stockings of Big Deep Lake in 2 of the years 2019 to 2022. The most recent, in 2022, included 2,080 walleye fingerlings. Species stocked: walleye.
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 Big Deep Lake was in August 1995: 9 gill nets and 9 trap nets caught 15 species. This survey is 31 years old.
Walleye per gill net, standard surveys: 1985 5.0 · 1990 3.0 · 1995 1.6
Bluegill per trap net, standard surveys: 1985 12 · 1990 9.5 · 1995 9.8
Walleye: 15 measured, 12 to 24 in, half 19 in or longer; average 3.1 lb, above normal (normal 1.2–3 lb).
Northern pike: 138 measured, 6 to 31 in, half 16 in or longer; average 1.3 lb, below normal (normal 1.5–3.2 lb).
Largemouth bass: 6 measured, 5 to 14 in, half 6 in or longer; average 0.72 lb, normal (normal 0.5–1.2 lb).
Smallmouth bass: 5 measured, 1 to 5 in, half 2 in or longer; average 0.1 lb, below normal (normal 0.2–0.7 lb).
Bluegill: 102 measured, 3 to 8 in, half 5 in or longer; average 0.15 lb, normal (normal 0.1–0.2 lb).
Also caught: black bullhead, brown bullhead, white sucker, yellow bullhead.
Source: Minnesota DNR Fisheries lake survey, 14 Aug 1995, 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
Minnesota DNR lake survey; straight-line miles.
Big Deep Lake is 107 feet at its deepest point, measured by Minnesota DNR survey. It covers 536 acres.
Yes. Minnesota DNR stocking reports list 2 stockings of it in 2 of the years 2019 to 2022. The most recent, in 2022, included 2,080 walleye fingerlings.
Minnesota DNR’s August 1995 standard survey caught 15 species, most often northern pike, bluegill, rock bass and pumpkinseed.
About 88% of the lake's area is deeper than 10 feet, measured from Minnesota DNR depth contours.