Upper South Long Lake
depth
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Depth scale
Survey readout
Upper South Long Lake is mapped to a depth of 45 ft on the Minnesota DNR survey and covers about 796 acres in Crow Wing County, Minnesota. Depths come from the Minnesota DNR survey of 1968.
Measured from the Minnesota DNR lake bathymetric contour survey.
- Deepest mapped contour
- 45 ft
- Survey year
- 1968
- Surface area
- 796 acres
- Shoreline
- 6.2 mi · irregular
- Aquatic vegetation
- 1% of surface · NDVI estimate
- Public access
- Trailer Launch · Upper South Long Lake Public Water Access Site · Minnesota DNR site
Additional depth details9 contours
- Contour depths
- 0–45 ft
- Recorded point soundings
- 45 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
- 46.31054, -94.03791
- MN DNR lake ID
- 18009600
- Vertical exaggeration
- 2.15×
- Basemap
- USDA NAIP · public domain
- Model size
- 2.3 MB
Paddling
Paddling Index methodology v1.0 · calculated 2026-09-25Upper South Long Lake has a partly natural setting, notable 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 | 19.8 of 35 | 64% natural land cover within 150 m of shore (42% forest, 22% wetland; 26% developed) |
| Geometric wind exposure | Mixed | 7.9 of 29 | mean fetch 2,357 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 | 1 DNR public access site · boat ramp |
| Road isolation | Good | 9.5 of 18 | some nearby classified roads · 4 MnDOT-classified segments within 1.2 km, peak 973 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
- Moderate — 42% forest and 22% 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).
Greater Redhorse
White Sucker
Hybrid Sunfish
About these fish → the Fish of Minnesota guide
Fishery
surveyed 2025Gamefish Largemouth Bass 133 · Walleye 36 · Northern Pike 21 · Bowfin 10
Panfish Bluegill 221 · Yellow Perch 80 · Pumpkinseed 35
All survey species15 species
Gamefish
Panfish
Bullhead & catfish
Forage & nongame
DNR stocking
state stocking record · 2017–2025Fish the Minnesota DNR has planted in this lake — what was added, distinct from what a survey netted above.
Infested waters listing
2 confirmedMussels & snails
Zebra MusselConfirmed in this water in 2021 (listed 2021).
Plants & algae
Eurasian WatermilfoilConfirmed 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
Upper South Long Lake — common questions
How deep is Upper South Long Lake?
The deepest contour on the Minnesota DNR bathymetric survey of Upper South Long Lake is 45 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 Upper South Long Lake?
Upper South Long Lake covers about 796 acres in Crow Wing County, Minnesota.
What fish are in Upper South Long Lake?
Species with survey, catch or recent-stocking evidence include largemouth bass, northern pike, walleye, black crappie, bluegill, bowfin. The page lists all 15 species and the evidence behind each.
Is there public access to Upper South Long Lake?
Yes. The Minnesota DNR lists a public access site on Upper South Long Lake: a boat ramp with a boat dock and restrooms. It is administered by the DNR Division of Parks and Trails. DNR directions: "5 miles East of Brainerd on MN Hwy. 18, then 4 miles South on Crow Wing Co. Rd. #23."
