Big Birch Lake
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Survey readout
Big Birch Lake is mapped to a depth of 80 ft on the Minnesota DNR survey and covers about 2,112 acres in Todd County, Minnesota. Depths come from the Minnesota DNR survey of 1980.
Measured from the Minnesota DNR lake bathymetric contour survey.
- Deepest mapped contour
- 80 ft
- Survey year
- 1980
- Surface area
- 2,112 acres
- Shoreline
- 14.11 mi · irregular
- Aquatic vegetation
- 2% of surface · NDVI estimate
- Public access
- Trailer Launch · Big Birch Lake (N) Public Water Access Site · Minnesota DNR site · 4 more
Additional depth details10 contours
- Contour depths
- 0–80 ft
- Recorded point soundings
- 80 ft
Provenance
Sources: MN DNR Lake Bathymetric Contours, USGS 3DEP, USDA NAIP (public domain), OpenStreetMap (ODbL).
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Map details & sources4 sources
All layers registered to one bounding box; positions in WGS 84.
Survey-derived depth contours drape over USGS 3DEP elevation, with a USDA NAIP aerial basemap and OpenStreetMap shoreline. Color shows surveyed depth; dark lines are the survey's own isobaths.
- Coordinates
- 45.78068, -94.75418
- MN DNR lake ID
- 77008400
- Vertical exaggeration
- 1.4×
- Basemap
- USDA NAIP · public domain
- Model size
- 2.5 MB
Paddling
Paddling Index methodology v1.0 · calculated 2026-09-25Big Birch Lake has a mixed natural and developed setting, notable open-water exposure, nearby higher-volume roads.
Why this score?5 components
Included in the index
| Component | Rating | Points of weight | Measurement |
|---|---|---|---|
| Natural setting | Mixed | 12.7 of 35 | 49% natural land cover within 150 m of shore (31% forest, 14% wetland; 31% developed) |
| Geometric wind exposure | Mixed | 6.9 of 29 | mean fetch 2,560 m · 0% of sampled water within 500 m of shelter · long fetch in some directions |
| Motor & speed rules | Not modeled | — | Minnesota’s lake-by-lake motor, speed and no-wake rules are mostly county and city ordinances, not map data, so they are not part of the Minnesota index. Check local signage and ordinances before going out. |
| Public access | Good | 15.0 of 18 | 5 DNR public access sites · boat ramp · fishing pier |
| Road isolation | Mixed | 6.1 of 18 | nearby higher-volume roads · 9 MnDOT-classified segments within 1.2 km, peak 1,650 vehicles/day |
Additional paddling considerations
These describe the lake but are not part of the v1 Paddling Index and do not change the number above.
- Wake sensitivity
- Low — wide enough that wakes disperse over most of the lake
- Aquatic vegetation
- Low — approximately 2% mapped coverage · NAIP aerial imagery (NDVI)
- Observed motorized activity
- Unknown — No lake-level measurement of boat traffic is available. Legal permission to operate motors is not evidence of use.
- Wildlife habitat potential
- Moderate — 31% forest and 14% wetland cover within 150 m of shore
Compare Minnesota lakes by Paddling Index →
Fish you might catch
from DNR surveys & active stocking16 species with recent evidence in this lake — sized relative to each other. Illustrations are AI-generated representative adults in everyday colors, not photographs (provenance).
Common Carp
White Sucker
Hybrid Sunfish
Golden ShinerAbout these fish → the Fish of Minnesota guide
Fishery
surveyed 2021Gamefish Northern Pike 433 · Walleye 123 · Largemouth Bass 70 · Smallmouth Bass 30
Panfish Bluegill 371 · Yellow Perch 77 · Rock Bass 64
All survey species16 species
Gamefish
Panfish
Bullhead & catfish
Forage & nongame
DNR stocking
state stocking record · 2016–2025Fish the Minnesota DNR has planted in this lake — what was added, distinct from what a survey netted above.
Infested waters listing
1 confirmedMussels & snails
Zebra MusselConfirmed in this water in 2016 (listed 2016).
How to identify invasive species in Minnesota lakes →
What does the infested waters list mean?
The Minnesota DNR lists a lake, river, pond or wetland as infested when it contains an aquatic invasive species that could spread to other waters, or when it is connected to a water where one is present. Activities such as bait harvest and water use are managed differently on infested waters. Check the current list before moving water, bait or equipment.
Source: Minnesota Department of Natural Resources. List of Infested Waters, September 9, 2026. https://www.dnr.state.mn.us/invasives/ais/infested.html
Big Birch Lake — common questions
How deep is Big Birch Lake?
The deepest contour on the Minnesota DNR bathymetric survey of Big Birch Lake is 80 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 Big Birch Lake?
Big Birch Lake covers about 2,112 acres in Todd County, Minnesota.
What fish are in Big Birch Lake?
Species with survey, catch or recent-stocking evidence include largemouth bass, northern pike, smallmouth bass, walleye, black crappie, bluegill. The page lists all 16 species and the evidence behind each.
Is there public access to Big Birch Lake?
Yes. The Minnesota DNR lists 5 public access sites on Big Birch Lake: Big Birch Lake (N) Public Water Access Site (boat ramp); Big Birch Lake (SE) Public Water Access Site (boat ramp); Big Birch Lake, Hunters Bay Public Water Access Site (boat ramp); Big Birch Lake, State Forest Public Water Access Site (boat ramp) and 1 more.
