Long Lake
depth
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Depth scale
Survey readout
Long Lake is mapped to a depth of 70 ft on the Minnesota DNR survey and covers about 155 acres in Itasca County, Minnesota. Depths come from the Minnesota DNR survey of 1938.
Measured from the Minnesota DNR lake bathymetric contour survey.
- Deepest mapped contour
- 70 ft
- Survey year
- 1938
- Surface area
- 155 acres
- Shoreline
- 4.46 mi · irregular
- Aquatic vegetation
- 1% of surface · NDVI estimate
- Public access
- Trailer Launch · Long Lake Public Water Access Site · Minnesota DNR site
Additional depth details7 contours
- Contour depths
- 0–70 ft
- Recorded point soundings
- 70 ft, 50 ft, 40 ft, 40 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
- 47.67733, -93.78040
- MN DNR lake ID
- 31078100
- Vertical exaggeration
- 1.4×
- Basemap
- USDA NAIP · public domain
- Model size
- 2.5 MB
Paddling
Paddling Index methodology v1.0 · calculated 2026-09-25Long Lake has a heavily wooded and largely undeveloped setting, well sheltered geometry, limited nearby major-road exposure.
Why this score?5 components
Included in the index
| Component | Rating | Points of weight | Measurement |
|---|---|---|---|
| Natural setting | Excellent | 34.3 of 35 | 96% natural land cover within 150 m of shore (68% forest, 27% wetland; 2% developed) |
| Geometric wind exposure | Excellent | 26.0 of 29 | mean fetch 579 m · 37% of sampled water within 500 m of shelter · short fetch in most 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 | 1 DNR public access site · boat ramp |
| Road isolation | Very Good | 11.7 of 18 | limited nearby major-road exposure · 2 MnDOT-classified segments within 1.2 km, peak 636 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 1% 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
- High — 68% forest and 27% wetland cover within 150 m of shore
Compare Minnesota lakes by Paddling Index →
Fish you might catch
from DNR surveys10 species with recent evidence in this lake — sized relative to each other. Illustrations are AI-generated representative adults in everyday colors, not photographs (provenance).
Hybrid Sunfish
About these fish → the Fish of Minnesota guide
Fishery
surveyed 2024Gamefish Northern Pike 24 · Largemouth Bass 16
Panfish Bluegill 158 · Black Crappie 19 · Pumpkinseed 7
All survey species10 species
Gamefish
Panfish
Bullhead & catfish
Forage & nongame
Infested waters listing
Not on the Minnesota DNR’s infested waters list as of September 9, 2026. This does not mean the lake is free of invasive species: the list covers certain species only, and a species can be present before anyone finds it.
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
Long Lake — common questions
How deep is Long Lake?
The deepest contour on the Minnesota DNR bathymetric survey of Long Lake is 70 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 Long Lake?
Long Lake covers about 155 acres in Itasca County, Minnesota.
What fish are in Long Lake?
Species with survey, catch or recent-stocking evidence include largemouth bass, northern pike, black crappie, bluegill, hybrid sunfish, pumpkinseed. The page lists all 10 species and the evidence behind each.
Is there public access to Long Lake?
Yes. The Minnesota DNR lists a public access site on Long Lake: a boat ramp. It is administered by the DNR Division of Parks and Trails. DNR directions: "6 mi N of Talmoon on Mn Hwy 6 to E shore."
