B

Gun Lake

Mason County, WisconsinLimited DataOligotrophic

Gun Lake is a cold, clear oligotrophic lake in Mason County, MI. Water quality is graded B based on 1 sampling years through 2021. The lake supports 17 documented fish species including Blacknose shiner, Bluntnose minnow, and Grass pickerel. Compared to the 7 other monitored lakes in Mason County, Gun Lake ranks #7 for water quality.

Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2021-09-09. Grade methodology: LakeGrade methodology.

Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Good clarity, visible to about 14 ft. Trophic State Index: 39.

Metric	Value	Grade
Water Clarity (Secchi Depth)	14 ft	B
Phosphorus	No data
Chlorophyll-a (Algae)	No data
Trophic State Index (TSI)	39	Oligotrophic

Low nutrients, clear water, excellent for swimming

Fish Species

Blacknose shiner Bluntnose minnow Grass pickerel Green sunfish Johnny darter Largemouth bass Longnose gar Mimic shiner Northern logperch Northern pike Rainbow smelt Rock bass Smallmouth bass Spotfin shiner Spottail shiner Western banded killifish Yellow perch

Click a species to see all Wisconsin and Minnesota lakes where it is found.

→ Best fishing times for Gun Lake (14-day solunar calendar)

→ Is it safe to eat fish from Gun Lake? (mercury & PFAS guide)

→ Gun Lake fishing regulations (limits, seasons, special rules)

Location

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County Ranking

Ranked #7 of 8 lakes in Mason County

Cleaner Lakes Within 30 Miles

Gun Lake holds Grade B. 2 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Mason County

Chancellor Lake

Chancellor Lake Central Basin

Gun Lake Central Basin; Freesoil Township

Lower Hamlin Lake North Central Basin South of the Narrows

More Wisconsin Lake Rankings

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Top 25 by overall water quality score

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Grade A/B + low algae filter

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Panfish-rich, public access

All Wisconsin lakes

Full state directory

Other Grade B Lakes in Wisconsin

Middle Lake; Elba Township; Section 13

Lapeer County · Clarity: 9.5 ft

Livingston County · Clarity: 13 ft

Bear Lake East Basin; Pleasanton Township

Manistee County · Clarity: 11 ft

Lake County · Clarity: 14 ft

Cass County · Clarity: 10.5 ft

Byram Lake West Central Basin; Fenton Township

Genesee County · Clarity: 10 ft

Oligotrophic Lakes in Wisconsin

Lake Ann Southeast Basin; Almira Township Section 26 Windover Lake South Basin; Freeman Township Squaw Lake Moon Lake Central Basin; Watersmeet Township

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Most recent sample: 2021-09-09

Monitoring stations: 1