4 miles southwest of Credit River
Scott County, Minnesota · 44.6341° N, 93.4136° W
Directions to McMahon Lake Public Water Access SiteApple Maps
Directions open in Google or Apple Maps, to the Minnesota DNR public access site.
Updated 19 Oct 2026, 6:14 pm EDT.
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Minnesota DNR lake survey, fetched 15 Oct 2026. Not for navigation.
1 public access site on McMahon Lake.
Minnesota DNR public water accesses, fetched 15 Oct 2026.
Minnesota DNR stocking reports list 5 stockings of McMahon Lake in 5 of the years 2016 to 2025. The most recent, in 2025, included 1,156 walleye fingerlings. Species stocked: walleye.
Latest: 2025: 1,156 walleye fingerlings.
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 McMahon Lake was in June 2025: 5 gill nets and 9 trap nets caught 10 species.
Walleye per gill net, standard surveys: 1998 0.7 · 2004 6.8 · 2010 6.0 · 2015 4.0 · 2025 5.4
Bluegill per trap net, standard surveys: 1998 136 · 2004 44 · 2010 80 · 2015 24 · 2025 42
Walleye: 28 measured, 11 to 26 in, half 21 in or longer; average 3.3 lb, above normal (normal 1–2.3 lb).
Northern pike: 147 measured, 15 to 35 in, half 20 in or longer; average 2 lb, normal (normal 1.8–3.4 lb).
Largemouth bass: 20 measured, 4 to 17 in, half 14 in or longer; average 1.7 lb, above normal (normal 0.6–1.4 lb).
Black crappie: 394 measured, 4 to 10 in, half 5 in or longer; average 0.11 lb, below normal (normal 0.2–0.4 lb).
Bluegill: 525 measured, 3 to 9 in, half 5 in or longer; average 0.11 lb, normal (normal 0.1–0.4 lb).
Also caught: black bullhead, golden shiner, hybrid sunfish.
Source: Minnesota DNR Fisheries lake survey, 23 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 5 ft: the Secchi depth across 3 readings, 2010–2025.
Minnesota Pollution Control Agency and volunteer Secchi readings, via Minnesota DNR LakeFinder, fetched 15 Oct 2026.
Minnesota DNR lake survey; straight-line miles.
McMahon Lake is 14 feet at its deepest point, measured by Minnesota DNR survey. It covers 187 acres.
Yes. 1 public access site is listed: McMahon Lake Public Water Access Site.
Yes. Minnesota DNR stocking reports list 5 stockings of it in 5 of the years 2016 to 2025. The most recent, in 2025, included 1,156 walleye fingerlings.
Minnesota DNR’s June 2025 standard survey caught 10 species, most often bluegill, black crappie, northern pike and yellow perch.
About 35% of the lake's area is deeper than 10 feet, measured from Minnesota DNR depth contours.