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LakeQuality

Gull Lake vs Round Lake

Water quality, depth, fish species, and recreation comparison.

Gull Lake and Round Lake both received the same overall water quality grade of A (Excellent). Both are in Minnesota.

Both Gull Lake and Round Lake sit in Minnesota. A same-state comparison strips out the state-level water-quality regime as a variable: any grade differences here are about the lakes themselves, not the agencies grading them. The grades are close: Gull Lake (A) and Round Lake (A) are within one letter of each other on the LakeGrade rubric. The per-parameter sub-grades below will show where the small differences actually live.

With grades this close, the choice between the two lakes turns on non-water-quality factors: depth, fish species, public access, distance from home. The per-lake pages below cover all of those.

A

Gull Lake

Cass County, Minnesota

Good clarity, visible to about 14.5 ft.

A

Round Lake

Crow Wing County, Minnesota

Good clarity, visible to about 13.5 ft.

Side-by-Side Metrics

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

MetricGull LakeRound Lake
Overall GradeA (Excellent)A (Excellent)
Water Clarity14.5 ft13.5 ft
Phosphorus14 µg/L17 µg/L
Chlorophyll-a (Algae)No dataNo data
Maximum Depth80 ft51 ft
Surface Area10.0K acres1.7K acres
Public AccessYesYes
Fish Species11
Trophic Statemesotrophicmesotrophic

Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).

Verdict

Both lakes earn the same Grade A. The tiebreakers come down to clarity (Gull Lake: 14.5 ft, Round Lake: 13.5 ft) and what you want from the lake. Gull Lake matches its peer on species count.