Crooked Lake
Crooked Lake in Hubbard County, Minnesota has a water quality grade of A (Excellent). Water clarity: 19 ft visibility. Phosphorus: 8 µg/L. Chlorophyll-a (algae): 2.2 µg/L.
- Clarity
- 19 ft
- Typical in August
- 75°F
- Type
- Oligotrophic
- Trend
- → Stable
- Public access
- Yes
Next lake in Hubbard County
Crooked Lake is a cold, clear oligotrophic lake in Hubbard County, Minnesota. Water quality is graded A based on 2 sampling years through 2025. Limited fish-species data available. Public access is available with 3 public boat landings. Compared to the 67 other monitored lakes in Hubbard County, Crooked Lake ranks #12 for water quality.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2025-10-13. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyLow algae
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)
Crystal clear, you can see 19 ft down. Phosphorus level: 8 µg/L. Chlorophyll-a: 2.2 µg/L. Trophic State Index: 36.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 19 ft | Not graded |
| Phosphorus | 8 µg/L | Good |
| Chlorophyll-a (Algae) | 2.2 µg/L | Good |
| Trophic State Index (TSI) | 36 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Crooked Lake
Compare lakeside cabins, hotels, and vacation rentals near Crooked Lake in Hubbard County, Minnesota — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
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Water Temperature
Crooked Lake typically sits around 75°F at the surface in August. Summer average is about 74°F. Usually warmest in Aug (about 75°F) and coldest in May (about 66°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 11 field readings (2024–2025) via the EPA Water Quality Portal. See the full Crooked Lake water temperature breakdown →
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Middle Crooked LakePublic
- East Crooked LakePublic
- Breezy Pines Resort and CampgroundSemi-private
Fishing Crooked Lake
Water Quality Trend: → Stable
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | -0.022 m/yr | 6 |
EPA Impairment Status
Crooked Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4C).
Causes of impairment
Source: EPA ATTAINS assessment unit MN29-0101-03 · Official waterbody report · Matched by proximity (2.06 km)
County Ranking
Ranked #12 of 68 lakes in Hubbard County
Nearby Lakes in Hubbard County
Frequently asked questions about Crooked Lake
What is the water quality grade for Crooked Lake?
- Crooked Lake in Hubbard County, Minnesota has a water quality grade of A (Excellent). Water clarity: 19 ft visibility. Phosphorus: 8 µg/L. Chlorophyll-a (algae): 2.2 µg/L.
Is Crooked Lake safe to swim in?
- Excellent for swimming, crystal clear water with minimal algae. Crooked 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.
What is the water temperature of Crooked Lake?
- Crooked Lake typically sits around 75°F at the surface in August, from 11 EPA Water Quality Portal field readings (2024–2025). That is a typical value for the month, not a live reading.
How deep is Crooked Lake?
- The available depth estimate for Crooked Lake is shallower than its measured water clarity, which cannot be right, so no depth is shown.
Are there boat ramps on Crooked Lake?
- Crooked Lake has 3 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Middle Crooked Lake, East Crooked Lake, Breezy Pines Resort and Campground. Public access is listed as yes.
Explore Crooked Lake across LakeGrade
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Where this data comes from
308 measurements from 3 monitoring stations, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA308 samples · 2020–2025
Analytical methods
- Field measurement/observation, generic method
- Phosphorus by Two Reagent Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
Monitoring station identifiers (3)
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)
Named boat-access points from the USGS National Boat Ramps inventory