South Twin Lake
depth
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Depth scale
Survey readout
South Twin Lake is mapped to a depth of 25 ft on the Minnesota DNR survey and covers about 1,128 acres in Mahnomen County, Minnesota. Depths come from the Minnesota DNR survey of 1976.
Measured from the Minnesota DNR lake bathymetric contour survey.
- Deepest mapped contour
- 25 ft
- Survey year
- 1976
- Surface area
- 1,128 acres
- Shoreline
- 5.12 mi · round
- Aquatic vegetation
- 0% of surface · NDVI estimate
- Public access
- Trailer Launch · South Twin Lake Public Water Access Site · Minnesota DNR site
Additional depth details5 contours
- Contour depths
- 0–25 ft
- Recorded point soundings
- 25 ft, 15 ft, 15 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
- 47.23247, -95.64477
- MN DNR lake ID
- 44001400
- Vertical exaggeration
- 2.83×
- Basemap
- USDA NAIP · public domain
- Model size
- 2.2 MB
Paddling
Paddling Index methodology v1.0 · calculated 2026-09-25South Twin Lake has a partly natural setting, moderate open-water exposure, some nearby classified roads.
Why this score?5 components
Included in the index
| Component | Rating | Points of weight | Measurement |
|---|---|---|---|
| Natural setting | Good | 19.7 of 35 | 63% natural land cover within 150 m of shore (46% forest, 16% wetland; 22% developed) |
| Geometric wind exposure | Good | 9.0 of 29 | mean fetch 2,145 m · 0% of sampled water within 500 m of shelter · moderate open-water fetch |
| 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 | 1 DNR public access site · boat ramp |
| Road isolation | Good | 10.3 of 18 | some nearby classified roads · 3 MnDOT-classified segments within 1.2 km, peak 950 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 0% 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 — 46% forest and 16% wetland cover within 150 m of shore
Compare Minnesota lakes by Paddling Index →
Fish you might catch
from DNR surveys & active stocking15 species with recent evidence in this lake — sized relative to each other. Illustrations are AI-generated representative adults in everyday colors, not photographs (provenance).
White Sucker
Hybrid Sunfish
About these fish → the Fish of Minnesota guide
Fishery
surveyed 2024Gamefish Northern Pike 326 · Largemouth Bass 156 · Walleye 41
Panfish Bluegill 270 · Hybrid Sunfish 62 · Pumpkinseed 32
All survey species15 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 2019 (listed 2019).
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
South Twin Lake — common questions
How deep is South Twin Lake?
The deepest contour on the Minnesota DNR bathymetric survey of South Twin Lake is 25 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 South Twin Lake?
South Twin Lake covers about 1,128 acres in Mahnomen County, Minnesota.
What fish are in South Twin Lake?
Species with survey, catch or recent-stocking evidence include largemouth bass, northern pike, walleye, black bullhead, black crappie, bluegill. The page lists all 15 species and the evidence behind each.
Is there public access to South Twin Lake?
Yes. The Minnesota DNR lists a public access site on South Twin Lake: a boat ramp. It is administered by the DNR Division of Parks and Trails. DNR directions: "3.7 mi S of Naytahwaush on Cnty Rd 4, then .4 mi E on Cnty Rd 104 to W shore."
