Brest Bay
depth
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Depth scale
Survey readout
Brest Bay is mapped to a depth of 20 ft on the NOAA NCEI survey and covers about 13,629 acres in Monroe County, Michigan. Coverage is sparse: about 82% of this lake lies well away from any surveyed contour, so most of the shape shown there is interpolated between distant measurements rather than mapped.
Derived from NOAA NCEI Great Lakes bathymetry data.
The maximum depth and the “deepest” marker describe Brest Bay itself. The map also renders the surrounding open-lake water inside the frame. Depths in that water reach about 28 ft.
- Deepest mapped contour
- 20 ft
- Surface area
- 13,629 acres
- Public access
- Boat Launch · Rec Passport
Additional depth details4 contours
- Contour depths
- 0–20 ft
- Recorded point soundings
- 20 ft
Other waters with a public launch on this map: N/A, River Raisin, Swan Creek, La Plaisance Creek. Their launches are not marked on the model — only Brest Bay’s own are.
Compare with another lakeProvenance
Sources: NOAA NCEI Great Lakes Bathymetry, USGS 3DEP, OpenStreetMap (ODbL), MI DNR Boat Launches, Contains modified Copernicus Sentinel data (Sentinel-2), processed by michiganlakedepths.com.
⚠ NOT FOR NAVIGATION. This is a recreational depth visualisation built from historical soundings, not a nautical chart. Use official NOAA charts (ENC/RNC) for navigation. Depths are referenced to low water datum and actual water levels vary.Spot an error? Send a correction
Map details & sources5 sources
All layers registered to one bounding box; positions in WGS 84.
Survey-derived depth contours drape over USGS 3DEP elevation, with a Copernicus Sentinel-2 satellite basemap and OpenStreetMap shoreline. Colour shows surveyed depth; dark lines are the survey's own isobaths.
- Coordinates
- 41.92500, -83.31000
- NOAA lake ID
- NOAA-GL-BREST
- Basemap
- Copernicus Sentinel-2 · ESA, via Microsoft Planetary Computer
- Model size
- 2.0 MB
Fish you might catch
from angler catches10 species with recent evidence in this lake — sized relative to each other. Illustrations are AI-generated representative adults in everyday colours, not photographs (provenance).
Longnose Gar
Channel Catfish
Walleye
Freshwater Drum
Largemouth Bass
Smallmouth Bass
White Bass
Bullhead
White Perch
Yellow PerchFishing rules for this lake Beta
Size and daily limits for the 10 species found here — 10 open to harvest.
These are hook-and-line size, daily limit and season rules. Gear, spearing and bow fishing, spawning closures and rod limits are set by other Fisheries Orders and are not shown here.
From the 2026 Michigan Fishing Regulations digest (General Fishing Regulations table and notes) / FO-215.23A (eff. 2023-09-15) / FO-252.26 (eff. 2026-04-01) / FO-240.26 / FO-253.26 (eff. 2026-04-01, Great Lakes trout and salmon by management unit) · verified 2026-08-24. Regulations can change — Michigan DNR rules are the controlling source; verify current regulations before fishing. Official regulations
Notable catches
Master Angler program · 2020–2025Trophy-size fish anglers caught here and registered with the DNR — what people have actually caught, distinct from what a survey netted or the state stocked below.
Catch details by species10 species
Biggest on record
Bait: artificial lure (24) · live bait (18) · combination (2)
Method: trolling (26) · still fishing (9) · spin casting (8)
Brest Bay — common questions
How deep is Brest Bay?
The deepest contour on the NOAA NCEI bathymetric survey of Brest Bay is 20 ft. That is the deepest depth the historical survey map records, which may differ from the deepest point of the lake itself.
How big is Brest Bay?
Brest Bay covers about 13,629 acres in Monroe County, Michigan.
What fish are in Brest Bay?
Species with survey, catch or recent-stocking evidence include channel catfish, largemouth bass, smallmouth bass, walleye, bullhead, freshwater drum. The page lists all 10 species and the evidence behind each.
Is there public access to Brest Bay?
Yes. The Michigan DNR boat-launch data identifies 6 public access sites on Brest Bay, including Bolles Harbor.