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LakeQuality
A

Fish Hook Lake

Hubbard County, MinnesotaMesotrophic

Fish Hook Lake earns an A — water clarity, phosphorus, and chlorophyll-a all rate among the best monitored waters in Hubbard 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 near 43 places Fish Hook Lake in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. The lake's 76 ft maximum depth is in the upper tier for Minnesota — deep enough for cold-water fish to find refuge in summer. Fish Hook Lake covers 1,643 acres alongside 9.1 miles of shoreline, large enough that conditions can vary meaningfully between bays. Fish Hook Lake sits at rank 47 of 77 in Hubbard County, in the lower half of the local distribution.

Fish Hook Lake is on the Minnesota infested-waters list for zebra mussels — boaters should follow clean-drain-dry protocols when moving gear to or from the lake. Walleye are documented at Fish Hook Lake, one of 14 fish species on record for the lake. A documented public access point at Fish Hook Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. The lake has a partial ice record — 23 observed ice-outs, centered near Apr 25. 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 2024-09-16. Grade methodology: LakeGrade methodology.

Swimming Safety

Excellent for swimming, crystal clear water with minimal algae

Water Quality Grade: A, Excellent

Good clarity, visible to about 10 ft. Phosphorus level: 13 µg/L. Trophic State Index: 43.

MetricValueGrade
Water Clarity (Secchi Depth)10 ftB
Phosphorus13 µg/LA
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)43Mesotrophic

Moderate nutrients, good water quality

Lake Details

CharacteristicValue
Maximum Depth76 ft
Average Depth26 ft
Surface Area1.6K acres
Shoreline Length9.1 mi
Littoral Zone40%
Public AccessYes

Fish Species

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

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

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

Fish Hook Lake fishing regulations (limits, seasons, special rules)

Invasive Species

zebra mussel

Water Quality Trend: Declining

Based on 5 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Stable+0.035 m/yr5
Phosphorus Declining+0.4 µg/L/yr5

Ice Season

Historical ice data from Minnesota DNR (35 observations).

Typical Ice-Out
Apr 25
Typical Ice-In
Nov 28

Estimated open water season: 217 days

EarliestLatest
Ice-Out2024-03-17 (2024)2013-05-11 (2013)
Ice-In2018-11-20 (2018)2015-12-19 (2015)

Most recent ice-out: 2025-04-17

Location

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County Ranking

Ranked #47 of 77 lakes in Hubbard County

Nearby Lakes in Hubbard County

State Parks Near Fish Hook Lake

DNR Fisheries Survey Summary

12 surveys on file from MN DNR Fisheries. Most recent: 2022-07-11 (Standard Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
Bluegill28.740.14 lb
Bluntnose Minnow25.27
Yellow Perch13.120.12 lb
CNM10.25
BCS7.90
Largemouth Bass7.691.03 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

591 fish · 28 in · 2022-07-11
1487402345678

Yellow Perch

92 fish · 59 in · 2022-07-11
4322056789

Largemouth Bass

119 fish · 518 in · 2022-07-11
189056789101112131415161718

From the 2022-07-11 survey

Fish Hook Lake is located two miles north of Park Rapids in west-central Hubbard County. Fish Hook has a surface area of 1,643 acres and a maximum depth of 76 feet. A DNR owned public access is located on the west shore of the lake off US-71. Access is also available from the Fish Hook River, with a county access in…

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 Fish Hook 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: 2024-09-16

Monitoring stations: 1