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LakeQuality
D

Hanging Horn Lake

Carlton County, MinnesotaLimited DataEutrophic

On the scoring rubric Hanging Horn Lake grades a D: clarity at 6.0 ft and phosphorus readings still being added keep it in the lower bracket for Carlton County. Sub-grades cluster within a single letter of each other, which usually means the lake is in stable trophic balance rather than fighting one specific stressor.

A TSI in the eutrophic range signals a lake doing what nutrient-loaded waters do — supporting an active algal community at the cost of clear water. The lake's 80 ft maximum depth is in the upper tier for Minnesota — deep enough for cold-water fish to find refuge in summer. The lake's 409 acres and 4.6 miles of shoreline put it in the mid-range bucket — large enough for varied use, small enough that watershed inputs reach the whole basin. Within the 33 graded lakes of Carlton County, Hanging Horn Lake sits at rank 31, near the bottom of the county list.

Hanging Horn Lake carries an invasive watermilfoil record — boat-launch decontamination and shoreline care matter more here than at uninfested lakes. The fishery includes walleye alongside the lake's other 11 documented species — a notable draw for Minnesota anglers. A documented public access point at Hanging Horn Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. The lake has a partial ice record — 5 observed ice-outs, centered near Apr 23. Monitoring depth is thin here: the LakeGrade rubric is applied to a small number of sample years, and the grade will be revised as more data accumulates.

Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2023-07-09. Grade methodology: LakeGrade methodology.

Swimming Safety

Swimming not recommended, poor water quality with high algae risk

Water Quality Grade: D, Poor

Murky, only visible to about 6 ft. Trophic State Index: 51.

MetricValueGrade
Water Clarity (Secchi Depth)6 ftD
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)51Eutrophic

High nutrients, frequent algae, reduced clarity

Lake Details

CharacteristicValue
Maximum Depth80 ft
Surface Area408.66 acres
Shoreline Length4.6 mi
Littoral Zone21%
Public AccessYes

Fish Species

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

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

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

Hanging Horn Lake fishing regulations (limits, seasons, special rules)

Invasive Species

Eurasian watermilfoil

Water Quality Trend: Improving

Based on 4 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Improving+0.716 m/yr4

Ice Season

Historical ice data from Minnesota DNR (10 observations).

Typical Ice-Out
Apr 23
Typical Ice-In
Dec 1

Estimated open water season: 222 days

EarliestLatest
Ice-Out2005-04-14 (2005)2022-05-04 (2022)
Ice-In1991-11-25 (1991)2004-12-03 (2004)

Most recent ice-out: 2022-05-04

Location

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County Ranking

Ranked #31 of 33 lakes in Carlton County

Nearby Lakes in Carlton County

DNR Fisheries Survey Summary

7 surveys on file from MN DNR Fisheries. Most recent: 2020-07-20 (Standard Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
Tullibee (Cisco)43.740.4 lb
Bluntnose Minnow20.29
JND7.63
Bluegill6.750.21 lb
Yellow Perch3.140.14 lb
MTS3.02

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.

Tullibee (Cisco)

230 fish · 612 in · 2020-07-20
1155806789101112

Bluegill

94 fish · 39 in · 2020-07-20
28140trophy 103456789

Yellow Perch

5 fish · 37 in · 2020-07-20
21034567

From the 2020-07-20 survey

Hanging Horn was surveyed during the summer of 2020 to evaluate and update information about fish populations, and to evaluate the effectiveness of the Rainbow Trout and Brown Trout stocking programs. Rainbow Trout and Brown Trout are the primary species of management for Hanging Horn Lake. Just over 19,500 yearling…

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 Hanging Horn Lake. 4 reports on file.

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Lake details from Minnesota DNR LakeFinder

Ice data from Minnesota DNR Climate

Most recent sample: 2023-07-09

Monitoring stations: 1