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F

Snelling Lake

Hennepin County, MinnesotaLimited DataEutrophic

Snelling Lake earns an F: phosphorus readings still being added and clarity at 1.6 ft signal heavy nutrient loading from the surrounding watershed.

At a TSI of 70, Snelling Lake reads as eutrophic — nutrient-rich enough that summer algal growth and reduced clarity are expected, not unusual. Snelling Lake is a shallow lake at 10 ft maximum depth, which means it warms quickly, mixes constantly, and amplifies nutrient inputs. At 103 acres, Snelling Lake fits the Minnesota median for monitored lakes, with 1.9 miles of shoreline. Within Hennepin County's 95 graded lakes, Snelling Lake ranks 61 — below the local median, though not at the bottom.

Snelling Lake carries an invasive watermilfoil record — boat-launch decontamination and shoreline care matter more here than at uninfested lakes. The fishery is bass-led, with 10 documented species across the lake's records. A documented public access point at Snelling Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.

Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2020-09-28. Grade methodology: LakeGrade methodology.

Reviewed by LakeQuality Editorial Team · Updated

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Swimming Safety

Avoid swimming, very poor water quality, potential algae toxins

Water Quality Grade: F, Very Poor

Very murky, less than 1.6 ft of visibility. Trophic State Index: 70.

MetricValueGrade
Water Clarity (Secchi Depth)1.6 ftF
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)70Eutrophic

High nutrients, frequent algae, reduced clarity

Lake Details

CharacteristicValue
Maximum Depth9.5 ft
Surface Area102.58 acres
Shoreline Length1.9 mi
Littoral Zone99%
Public AccessYes

Fish Species

black bullhead,black crappie,bluegill,green sunfish,hybrid sunfish,largemouth bass,northern pike,pumpkinseed,yellow bullhead,yellow perch

Click a species to see all Minnesota and Wisconsin lakes where it is found.

→ Best fishing times for Snelling Lake (14-day solunar calendar)

→ Is it safe to eat fish from Snelling Lake? (mercury & PFAS guide)

Snelling Lake fishing regulations (limits, seasons, special rules)

Invasive & Introduced Species

Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.

Eurasian watermilfoil

Water Quality Trend: Improving

Based on 2 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Improving+0.117 m/yr2

Location

Loading map…

County Ranking

Ranked #61 of 95 lakes in Hennepin County

Cleaner Lakes Within 30 Miles

Snelling Lake holds Grade F. 4 nearby lakes hold higher grades.

Nearby Lakes in Hennepin County

DNR Fisheries Survey Summary

13 surveys on file from MN DNR Fisheries. Most recent: 2017-06-06 (Standard Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
Bluegill30.620.13 lb
Black Bullhead15.270.4 lb
Pumpkinseed11.920.09 lb
Hybrid Sunfish10.820.1 lb
Yellow Bass5.810.36 lb
Brown Bullhead2.900.57 lb

CPUE = catch per unit effort, averaged across surveys (excludes juvenile shoreline seining). Higher CPUE = more abundant in standardized sampling.

Length Distributions

Number of fish caught at each inch class in the most recent survey that recorded lengths. Red dashed line marks an approximate trophy threshold for that species.

Bluegill

204 fish · 38 in · 2017-06-06
103520345678

Black Bullhead

114 fish · 611 in · 2017-06-06
6834067891011

Pumpkinseed

89 fish · 38 in · 2017-06-06
30150345678

Hybrid Sunfish

18 fish · 37 in · 2017-06-06
116034567

From the 2017-06-06 survey

Snelling Lake is located in Fort Snelling State Park, one of the most popular state parks in Minnesota. Shore fishing locations include a pier on the north end of the lake. Boat access is available on the southern end of the lake but gas engines are prohibited. This shallow class 43 lake is heavily vegetated with a…

Source: MN DNR LakeFinder Fisheries Lake Survey

DNR Reports & Resources

Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Snelling Lake. 3 reports on file.

Reservoir Info (USACE NID)

Snelling Lake is a man-made reservoir impounded by the Snelling Lake (completed 1965), built primarily for recreation on the Minnesota River-TR; other-type dam, 15 ft tall and 6 ft long.

Surface area
103 ac
Normal storage
896 ac-ft
Max storage
1,232 ac-ft
Drainage area
1.4 sq mi
Hazard class
Low
Owner
MNDNR-Parks

Source: USACE National Inventory of Dams, NID ID MN00521 · Operator website

EPA Impairment Status

Snelling Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).

Causes of impairment

Mercury

A Total Maximum Daily Load (TMDL) plan has been approved.

Source: EPA ATTAINS assessment unit MN27-0001-00 · Official waterbody report

Data Sources

Water quality data from the EPA Water Quality Portal

Impairment status from EPA ATTAINS 303(d) database

Grading methodology based on Metropolitan Council standards

Lake details from Minnesota DNR LakeFinder

Most recent sample: 2020-09-28

Monitoring stations: 1