3 miles southwest of Marine on St. Croix
Washington County, Minnesota · 45.1567° N, 92.8044° W
Directions to Square Lake Public Water Access SiteApple Maps
Directions open in Google or Apple Maps, to the Minnesota DNR public access site.
Updated 15 Oct 2026, 5:38 pm EDT.
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Minnesota DNR lake survey, fetched 15 Oct 2026. Not for navigation.
1 public access site on Square Lake.
Minnesota DNR public water accesses, fetched 15 Oct 2026.
Minnesota DNR’s latest standard fish survey of Square Lake was in August 2014: 4 gill nets and 9 trap nets caught 11 species. This survey is 12 years old. The DNR also ran a targeted survey in August 2016; this section uses the latest standard survey.
Northern pike per gill net, standard surveys: 1994 6.5 · 1998 5.7 · 2003 7.5 · 2008 3.8 · 2014 5.8
Bluegill per trap net, standard surveys: 1994 4.5 · 1998 17 · 2003 17 · 2008 9.2 · 2014 12
Northern pike: 33 measured, 9 to 37 in, half 15 in or longer; average 2.2 lb, normal (normal 1.5–3.2 lb).
Black crappie: 34 measured, 5 to 10 in, half 8 in or longer; average 0.36 lb, normal (normal 0.3–0.5 lb).
Bluegill: 121 measured, 3 to 9 in, half 6 in or longer; average 0.23 lb, above normal (normal 0.1–0.2 lb).
Yellow perch: 6 measured, 6 to 10 in, half 9 in or longer; average 0.42 lb, above normal (normal 0.1–0.2 lb).
Also caught: black bullhead, brown bullhead, hybrid sunfish, yellow bullhead.
Source: Minnesota DNR Fisheries lake survey, 6 Aug 2014, 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 17 ft: the Secchi depth across 2 readings, 2008–2014.
Minnesota Pollution Control Agency and volunteer Secchi readings, via Minnesota DNR LakeFinder, fetched 15 Oct 2026.
Minnesota DNR lake survey; straight-line miles.
Square Lake is 68 feet at its deepest point, measured by Minnesota DNR survey. It covers 203 acres.
Yes. 1 public access site is listed: Square Lake Public Water Access Site.
Minnesota DNR’s August 2014 standard survey caught 11 species, most often bluegill, hybrid sunfish, northern pike and pumpkinseed.
About 76% of the lake's area is deeper than 10 feet, measured from Minnesota DNR depth contours.