Flowage Lake

Aitkin County, Minnesota · MN DNR bathymetric survey

5ft Max
depth

613 acres 1 contour Public access

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Depth scale

The lake

Survey readout

Flowage Lake is mapped to a depth of 5 ft on the Minnesota DNR survey and covers about 613 acres in Aitkin County, Minnesota. Depths come from the Minnesota DNR survey of 1985.

Measured from the Minnesota DNR lake bathymetric contour survey.

Deepest mapped contour: 5 ft
Survey year: 1985
Surface area: 613 acres
Shoreline: 8.2 mi · irregular
Aquatic vegetation: 3% of surface · NDVI estimate
Public access: Trailer Launch · Sandy River, Flowage Public Water Access Site · Minnesota DNR site

Additional depth details1 contour

Contour depths: 0–5 ft
Recorded point soundings: 5 ft

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Location

Aitkin County, Minnesota · 15 nearest of 45 lakes · tap a dot for that 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: 46.70257, -93.31992
MN DNR lake ID: 01006100
Basemap: USDA NAIP · public domain
Model size: 2.2 MB

Paddling

Paddling Index methodology v1.0 · calculated 2026-09-25

66 / 100MixedData confidence: High

Flowage Lake has a heavily wooded and largely undeveloped setting, moderate open-water exposure, nearby higher-volume roads.

Why this score?5 components

Included in the index

Component	Rating	Points of weight	Measurement
Natural setting	Excellent	31.2 of 35	87% natural land cover within 150 m of shore (43% forest, 43% wetland; 8% developed)
Geometric wind exposure	Good	13.0 of 29	mean fetch 1,549 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	Mixed	6.9 of 18	nearby higher-volume roads · 7 MnDOT-classified segments within 1.2 km, peak 3,084 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 3% 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 — 43% forest and 43% wetland cover within 150 m of shore

Compare Minnesota lakes by Paddling Index →

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 2021–2024). Conditions change quickly — check current weather and local conditions before going out.

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

Flowage Lake — common questions

How deep is Flowage Lake?

The deepest contour on the Minnesota DNR bathymetric survey of Flowage Lake is 5 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 Flowage Lake?

Flowage Lake covers about 613 acres in Aitkin County, Minnesota.

Is there public access to Flowage Lake?

Yes. The Minnesota DNR lists a public access site on Flowage Lake: a boat ramp. It is administered by the DNR Division of Parks and Trails. DNR directions: "5 mi N of McGregor on MN Hwy 65, then 1 mi NW on gravel Rd to S shore."

More lakes in Aitkin County

Cedar Lake (Main Basin)