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.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 10 ft | B |
| Phosphorus | 13 µg/L | A |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 76 ft |
| Average Depth | 26 ft |
| Surface Area | 1.6K acres |
| Shoreline Length | 9.1 mi |
| Littoral Zone | 40% |
| Public Access | Yes |
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
Water Quality Trend: ↓ Declining
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | +0.035 m/yr | 5 |
| Phosphorus | ↓ Declining | +0.4 µg/L/yr | 5 |
Ice Season
Historical ice data from Minnesota DNR (35 observations).
Estimated open water season: 217 days
| Earliest | Latest | |
|---|---|---|
| Ice-Out | 2024-03-17 (2024) | 2013-05-11 (2013) |
| Ice-In | 2018-11-20 (2018) | 2015-12-19 (2015) |
Most recent ice-out: 2025-04-17
Location
County Ranking
Ranked #47 of 77 lakes in Hubbard County
Nearby Lakes in Hubbard County
More Minnesota Lake Rankings
State Parks Near Fish Hook Lake
Other Grade A Lakes in Minnesota
Mesotrophic Lakes in Minnesota
DNR Fisheries Survey Summary
12 surveys on file from MN DNR Fisheries. Most recent: 2022-07-11 (Standard Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Bluegill | 28.74 | 0.14 lb |
| Bluntnose Minnow | 25.27 | — |
| Yellow Perch | 13.12 | 0.12 lb |
| CNM | 10.25 | — |
| BCS | 7.90 | — |
| Largemouth Bass | 7.69 | 1.03 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
Yellow Perch
Largemouth Bass
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…
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.
- —Fisheries Lake Survey — Fish HookFisheries Lake Survey · MN DNR LakeFinder
- —Aquatic Plant Report — Fish Hook (1285)Aquatic Plant Report · MN DNR LakeFinder
- —Fish Stocking History — Fish HookFish Stocking History · MN DNR LakeFinder
- —Public Water Access Sites — Fish HookPublic Water Access Sites · MN DNR LakeFinder
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