Gun Lake Central Basin; Freesoil Township is a cold, clear oligotrophic lake in Mason County, Michigan. Water quality is graded A based on 2 sampling years through 2021. The lake supports 6 documented fish species including Blackchin shiner, Bluegill, and Bluntnose minnow. Public access is available with 1 public boat landing. Compared to the 7 other monitored lakes in Mason County, Gun Lake Central Basin; Freesoil Township ranks #4 for water quality.
Source: EPA Water Quality Portal sampling records, Michigan DNR, last sampled 2021-09-09. Grade methodology: LakeGrade methodology.
Watch Gun Lake Central Basin; Freesoil Township water quality
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Swimming Safety
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
Good clarity, visible to about 14 ft. Chlorophyll-a: 2.2 µg/L. Trophic State Index: 39.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 14 ft | B |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 2.2 µg/L | A |
| Trophic State Index (TSI) | 39 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Gun Lake Central Basin; Freesoil Township
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Fish Species
Click a species to see every graded lake where it is documented.
Fishing Gun Lake Central Basin; Freesoil Township
- → Gun Lake Central Basin; Freesoil Township fishing forecast & best times (species outlook + 14-day solunar calendar)
- → Gun Lake Central Basin; Freesoil Township fishing regulations (limits, seasons, special rules)
- → Is it safe to eat fish from Gun Lake Central Basin; Freesoil Township? (mercury & PFAS guide)
Recreation & Access
Water Temperature
Gun Lake Central Basin; Freesoil Township averages about 72°F at the surface in summer, usually warmest in Aug (about 76°F) and coldest in Jun (about 66°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 63 field readings (2021–2021) via the EPA Water Quality Portal. See the full Gun Lake Central Basin; Freesoil Township water temperature breakdown →
Location
County Ranking
Ranked #4 of 8 lakes in Mason County
Nearby Lakes in Mason County
Explore Gun Lake Central Basin; Freesoil Township across LakeGrade
Fish species and top-graded lakes across Michigan
Fish species and best lakes in Mason County
Species activity outlook by water temperature and season
Where to stay at Michigan's top lakes, each with its grade
Low nutrients, clear water, excellent for swimming
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Other Grade A Lakes in Michigan
Oligotrophic Lakes in Michigan
More records, surveys & data sources
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Data Sources
Water quality data from the EPA Water Quality Portal
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Public boat-access points from the USGS National Boat Ramps inventory
Most recent sample: 2021-09-09
Monitoring stations: 1