Minnesota Lake Depths
NESW

Fond du Lac Reservoir

Carlton County, Minnesota · MN DNR bathymetric survey
60ft Max
depth
201 acres 8 contours Public access
Paddling Index83Very Goodwooded shoreline · sheltered geometry · carry-in access
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Depth scale

The lake

Survey readout

Fond du Lac Reservoir is mapped to a depth of 60 ft on the Minnesota DNR survey and covers about 201 acres in Carlton County, Minnesota. Depths come from the Minnesota DNR survey of 1993.

Measured from the Minnesota DNR lake bathymetric contour survey.

Deepest mapped contour
60 ft
Survey year
1993
Surface area
201 acres
Shoreline
5.68 mi · irregular
Aquatic vegetation
2% of surface · NDVI estimate
Public access
Carry-In · St. Louis River, Fond du Lac Reservoir Public Water Access Site · Minnesota DNR site
Additional depth details8 contours
Contour depths
0–60 ft
Recorded point soundings
60 ft
Compare with another lake
Chart data

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
46.66193, -92.32502
MN DNR lake ID
09016700
Vertical exaggeration
1.64×
Basemap
USDA NAIP · public domain
Model size
2.7 MB

Paddling

Paddling Index methodology v1.0 · calculated 2026-09-25
83 / 100Very GoodData confidence: High

Fond du Lac Reservoir has a heavily wooded and largely undeveloped setting, generally sheltered geometry, some nearby classified roads.

Why this score?5 components

Included in the index

ComponentRatingPoints of weightMeasurement
Natural settingExcellent30.6 of 3588% natural land cover within 150 m of shore (73% forest, 11% wetland; 6% developed)
Geometric wind exposureVery Good24.1 of 29mean fetch 652 m · 21% of sampled water within 500 m of shelter · generally short fetch
Motor & speed rulesNot 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 accessExcellent17.6 of 181 DNR public access site · carry-in or canoe launch
Road isolationGood10.4 of 18some nearby classified roads · 4 MnDOT-classified segments within 1.2 km, peak 1,422 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
High — 73% forest and 11% wetland cover within 150 m of shore
State water trail
On a state water trail — Part of a designated Minnesota State Water Trail: St. Louis River. · MN DNR State Water Trails
How this index is calculated. The Paddling Index is a relative composite derived from lake geometry and public land-cover, access and traffic-count data. It is not a user review, a safety rating, or a prediction of an individual outing. Differences of a few points should not be treated as meaningful — an 84 and an 82 are broadly comparable. Components and weights for Minnesota lakes: natural setting 35%, geometric wind exposure 29%, public access 18%, road isolation 18%. Motor, speed and no-wake rules are not modeled for Minnesota, and traffic counts cover state, county and some city roads but not township roads. Where a component has no data the remaining weights are renormalized and the confidence rating is lowered; below Medium confidence no number is shown. Minnesota scores are relative to other Minnesota lakes and are not directly comparable with Paddling Index scores on our sister sites, which use different data sources, some with a watercraft-rules component. Sources: MN DNR lake bathymetry outline, USGS/MRLC NLCD Land Cover (2021), MN DNR Water Access Sites and Fishing Piers & Shore Fishing Sites (2026-09) and MnDOT Annual Average Daily Traffic (counts 2023–2025). Conditions change quickly — check current weather and local conditions before going out.

Fish you might catch

from DNR surveys

11 species with recent evidence in this lake — sized relative to each other. Illustrations are AI-generated representative adults in everyday colors, not photographs (provenance).

Compiled from Minnesota DNR fishery surveys. Silhouettes are stylized and scaled to typical adult sizes relative to one another. Presence is not a promise — fishing isn’t a sure thing.

Fishery

surveyed 2015
316Fish sampled
11Species

Gamefish Channel Catfish 140 · Walleye 22 · Smallmouth Bass 20 · Northern Pike 4

Panfish Rock Bass 47 · Black Crappie 24 · Yellow Perch 7

All survey species11 species

Gamefish

Channel Catfish140 caught · to 30″
Walleye22 caught · to 22″
Smallmouth Bass20 caught · to 15″
Northern Pike4 caught · to 18″

Panfish

Rock Bass47 caught · to 10″
Black Crappie24 caught · to 11″
Yellow Perch7 caught · to 10″
Bluegill1 caught · to 8″

Forage & nongame

White Sucker41 caught · to 20″
Stonecat6 caught · to 9″
Shorthead Redhorse4 caught · to 19″
Length is the largest fish netted in the survey, not an angler record. Source: Minnesota DNR lake survey (LakeFinder).

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

Quick answers

Fond du Lac Reservoir — common questions

How deep is Fond du Lac Reservoir?

The deepest contour on the Minnesota DNR bathymetric survey of Fond du Lac Reservoir is 60 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 Fond du Lac Reservoir?

Fond du Lac Reservoir covers about 201 acres in Carlton County, Minnesota.

What fish are in Fond du Lac Reservoir?

Species with survey, catch or recent-stocking evidence include channel catfish, northern pike, smallmouth bass, walleye, black crappie, bluegill. The page lists all 11 species and the evidence behind each.

Is there public access to Fond du Lac Reservoir?

Yes. The Minnesota DNR lists a public access site on Fond du Lac Reservoir: a carry-in launch. It is administered by the DNR Division of Parks and Trails. DNR directions: "From Carlton, take Hwy 210 west through Jay Cooke State Park to the Superior Hiking Trail parking lot."