Brevoort Lake
Brevoort Lake in Mackinac County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 10.5 ft visibility. Surface area: 4314 acres.
- Clarity
- 10.5 ft
- Mean depth
- ~12 ft est.
- Area
- 4,314 acres
- Public access
- Yes
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Why Brevoort Lake has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Brevoort Lake, the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity. Sampling here has recorded water clarity, but not phosphorus and algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by EGLE and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Brevoort Lake is a 4,314-acre lake in Mackinac County, Michigan with an estimated average depth of about 12 feet. The lake supports 15 documented fish species including Bluegill, Bluntnose minnow, and Brown bullhead. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2016-08-25. Grade methodology: LakeQuality methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Brevoort Lake
These readings exist but are not enough for an A–F grade — see why.
Good clarity, visible to about 10.5 ft. Trophic State Index: 43.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 10.5 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Brevoort Lake
Compare lakeside cabins, hotels, and vacation rentals near Brevoort Lake in Mackinac County, Michigan — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Brevoort Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Average Depth | ~12 ft est. |
| Surface Area | 4,314 acres |
| Public Access | Yes |
Depth marked “est.” is a modeled estimate from HydroLAKES, not a measured survey. Michigan has not published bathymetry for Brevoort Lake.
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Recreation & Access
- Dukes RoadPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Brevoort Lake
Reservoir Info (USACE NID)
Brevoort Lake is a man-made reservoir impounded by the Brevoort Lake Dam (completed 1938), built primarily for recreation on the Brevoort River; earth-type dam, 10 ft tall and 656 ft long.
- Surface area
- 4,314 ac
- Normal storage
- 20,500 ac-ft
- Max storage
- 35,000 ac-ft
- Drainage area
- 51 sq mi
- Hazard class
- Low
- Owner
- USDA FS
All listed purposes: Recreation;Fish and Wildlife Pond.
Source: USACE National Inventory of Dams, NID ID MI00155 · Operator website
Graded lakes near Brevoort Lake
Brevoort Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Mackinac County
Frequently asked questions about Brevoort Lake
Where is Brevoort Lake?
- Brevoort Lake is a lake in Mackinac County, Michigan. LakeQuality has not rated this lake (UNRATED) — the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity.
What is the water quality grade for Brevoort Lake?
- Brevoort Lake in Mackinac County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 10.5 ft visibility. Surface area: 4314 acres.
Is Brevoort Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Brevoort Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
How deep is Brevoort Lake?
- No published bathymetric survey covers Brevoort Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 12 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 4314 acres.
What fish are in Brevoort Lake?
- Fish species found in Brevoort Lake include Bluegill, Bluntnose minnow, Brown bullhead, Common shiner, Golden shiner, Iowa darter, Johnny darter, Lake herring, Largemouth bass, Mimic shiner, Northern logperch, Pumpkinseed, Rock bass, White sucker, Yellow perch. Brevoort Lake is located in Mackinac County, Michigan.
Are there boat ramps on Brevoort Lake?
- Brevoort Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Dukes Road. Public access is listed as yes.
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Where this data comes from
10 measurements from 1 monitoring station, 2016. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- North American Lake Management Society
NALMS10 samples · 2016
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)
Named boat-access points from the USGS National Boat Ramps inventory