Fourth Crow Wing Lake
Fourth Crow Wing Lake in Hubbard County, Minnesota has a water quality grade of A (Excellent). Water clarity: 8 ft visibility. Phosphorus: 19.5 µg/L. Chlorophyll-a (algae): 2.2 µg/L. Maximum depth: 10 ft. Surface area: 434.2 acres.
- Clarity
- 8 ft
- Max depth
- 10 ft
- Area
- 434 acres
- Type
- Mesotrophic
- Trend
- → Stable
- Public access
- Yes
Next lake in Hubbard County
Fourth Crow Wing Lake is a 434-acre mesotrophic lake in Hubbard County, Minnesota with a maximum depth of 10 feet (5-foot average). Water quality is graded A based on 2 sampling years through 2020. Water clarity is improving over recent sampling years. The lake supports 16 documented fish species including black crappie, bluegill, and bowfin (dogfish). Public access is available with 2 public boat landings. Compared to the 67 other monitored lakes in Hubbard County, Fourth Crow Wing Lake ranks #42 for water quality.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2020-09-16. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyLimited data
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A (Excellent)
Moderate clarity, visible to about 8 ft. Phosphorus level: 19.5 µg/L. Chlorophyll-a: 2.2 µg/L. Trophic State Index: 44.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 8 ft | Not graded |
| Phosphorus | 19.5 µg/L | Good |
| Chlorophyll-a (Algae) | 2.2 µg/L | Good |
| Trophic State Index (TSI) | 44 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Fourth Crow Wing Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 10 ft |
| Average Depth | 5 ft |
| Surface Area | 434 acres |
| Shoreline Length | 4.8 mi |
| Littoral Zone | 101% |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- 4th Crow Wing LakePublic
- 3rd Crow Wing LakePublic
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Fourth Crow Wing Lake
Invasive & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
DNR Fisheries Survey Summary
9 surveys on file from MN DNR Fisheries. Most recent: 2024-05-29 (Standard Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| BCS | 81.15 | — |
| BNS | 63.50 | — |
| Largemouth Bass | 38.42 | 1.72 lb |
| CSH | 19.00 | — |
| BKF | 15.64 | — |
| Yellow Perch | 15.29 | 0.21 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.
Largemouth Bass
Yellow Perch
From the 2024-05-29 survey
Fourth Crow Wing Lake is located eight miles south of Nevis in southern Hubbard County. Fourth Crow Wing is part of a chain of lakes running from Eleventh Crow Wing Lake at the headwaters, down to First Crow Wing Lake. Fourth Crow Wing Lake has a surface area of 441 acres and a maximum depth of 10 feet. A DNR-owned…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Fourth Crow Wing Lake. 3 reports on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — Fourth Crow WingFisheries Lake Survey · MN DNR LakeFinder
- —Aquatic Plant Report — Fourth Crow Wing (1293)Aquatic Plant Report · MN DNR LakeFinder
- —Public Water Access Sites — Fourth Crow WingPublic Water Access Sites · MN DNR LakeFinder
Water Quality Trend: → Stable
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.491 m/yr | 6 |
| Phosphorus | → Stable | -0.06 µg/L/yr | 5 |
| Chlorophyll-a | ↓ Declining | +1.22 µg/L/yr | 5 |
EPA Impairment Status
Fourth Crow Wing Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MN29-0078-00 · Official waterbody report
County Ranking
Ranked #42 of 68 lakes in Hubbard County
Nearby Lakes in Hubbard County
Frequently asked questions about Fourth Crow Wing Lake
What is the water quality grade for Fourth Crow Wing Lake?
- Fourth Crow Wing Lake in Hubbard County, Minnesota has a water quality grade of A (Excellent). Water clarity: 8 ft visibility. Phosphorus: 19.5 µg/L. Chlorophyll-a (algae): 2.2 µg/L. Maximum depth: 10 ft. Surface area: 434.2 acres.
Is Fourth Crow Wing Lake safe to swim in?
- Excellent for swimming, crystal clear water with minimal algae. Fourth Crow Wing Lake has a water quality grade of A (Excellent). Algae concentration (chlorophyll-a) is 2.2 µg/L. Always check local health department advisories before swimming.
How deep is Fourth Crow Wing Lake?
- Fourth Crow Wing Lake has a maximum depth of 10 feet and an average depth of 5 feet. The lake covers 434.2 acres.
What fish are in Fourth Crow Wing Lake?
- Fish species found in Fourth Crow Wing Lake include black crappie, bluegill, bowfin (dogfish), brown bullhead, common carp, greater redhorse, hybrid sunfish, largemouth bass, northern pike, pumpkinseed, rock bass, shorthead redhorse, walleye, white sucker, yellow bullhead, yellow perch. Fourth Crow Wing Lake is located in Hubbard County, Minnesota.
Are there boat ramps on Fourth Crow Wing Lake?
- Fourth Crow Wing Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include 4th Crow Wing Lake, 3rd Crow Wing Lake. Public access is listed as yes.
Explore Fourth Crow Wing Lake across LakeGrade
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Where this data comes from
14 measurements from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA14 samples · 2020
Analytical methods
- Field measurement/observation, generic method
- Phosphorus by Two Reagent Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)
Lake details from Minnesota DNR LakeFinder
Named boat-access points from the USGS National Boat Ramps inventory