Blue Lake (Hubbard County)
Hubbard County, Minnesota - DNR stocking history, depth and survey data
Minnesota · Minnesota Department of Natural Resources (DNR) · DOW 29018400
DNR records show 12 stocking entries at Blue Lake (Hubbard County) since 2016, most recently rainbow trout fingerlings in 2024 (4,865 fish).
- Blue Lake (Hubbard County) has 12 DNR stocking records across 5 years (2016-2024): walleye (7), rainbow trout (5).
- The most-stocked species by count is rainbow trout: 24,388 fish on record.
- Maximum depth 84 ft, mean depth 44 ft; surface area 336 acres, 81 littoral acres, 3.2 miles of shoreline, per the DNR lake survey.
- Average water clarity (Secchi depth) 15.6 ft.
- Fish species DNR lists here: black crappie, bluegill, brown bullhead, largemouth bass, pumpkinseed, rainbow trout, rock bass, smallmouth bass, tullibee (cisco), walleye, white sucker, yellow bullhead, and 1 more.
- 1 public access on the DNR list.
- Most recent DNR fish survey: (targeted survey).
- Hubbard County, nearest town Park Rapids; DNR lake number (DOW) 29018400.
Depth map
Bathymetric contours from the Minnesota DNR lake survey mapped 10/18/1973 (orig map); depths in feet. Simplified for the web; not for navigation.
Stocking history
| Year | Species | Size | Number | Pounds |
|---|---|---|---|---|
| 2024 | Rainbow Trout | fingerlings | 4,865 | 852.0 |
| 2024 | Walleye | yearlings | 12 | 3.0 |
| 2024 | Walleye | fingerlings | 1,098 | 93.0 |
| 2022 | Rainbow Trout | fingerlings | 4,864 | 615.7 |
| 2022 | Walleye2 | fingerlings | 1,360 | 85.0 |
| 2020 | Rainbow Trout | fingerlings | 4,934 | 839.1 |
| 2020 | Walleye | yearlings | 1,379 | 85.0 |
| 2018 | Rainbow Trout | fingerlings | 4,863 | 754.0 |
| 2018 | Walleye | fingerlings | 1,734 | 85.0 |
| 2016 | Rainbow Trout | fingerlings | 4,862 | 892.1 |
| 2016 | Walleye | fingerlings | 32 | 2.0 |
| 2016 | Walleye | adults | 395 | 130.0 |
2 fish purchased by the DNR for stocking.
Field note · Minnesota stocks by year, not by truck day: walleye fry go in within weeks of ice-out, fingerlings and yearlings mostly in fall, and stream trout in spring and fall. A row here means the fish went in during that year; DNR adds the year's rows after the fact, so the current year can look empty until winter.
Public accesses
| Type | Owner | Where |
|---|---|---|
| concrete ramp | Minnesota DNR | access is located along northwest shoreline on half moon road west |
DNR fish survey, 2025
Temperature and dissolved oxygen measurements were collected from the deepest basin in Blue Lake on August 7th, 2025. This was done to evaluate the quantity and quality of cold, oxygenated water (i.e., oxythermal habitat) available to Cisco, also known as Tullibee, the most sensitive coldwater species present in this lake. Cisco require a layer of oxythermal habitat that contains water temperatures below 21.2 degrees C (70.2 degrees F) and dissolved oxygen concentrations above 3.0 mg/L. Based on data collected from the deepest basin (maximum sampled depth was 80.0 feet), the water temperature decreased to 21.2 degrees C (70.2 degrees F) at 22.0 feet and the dissolved oxygen concentration decreased to 3.0 mg/L at 36.9 feet at the time of sampling. This layer in the water column was 14.9 feet, indicating oxythermal habitat for Cisco was present. Further, the temperature at which dissolved oxygen decreased to 3.0 mg/L (i.e., TDO3, a single variable to characterize oxythermal habitat) was 8.2 degrees C (46.8 degrees F). TDO3 values cooler than 21.2 degrees C (70.2 degrees F) indicate that oxythermal conditions were suitable for Cisco at the time of the survey. Data collected by the Minnesota Department of Natural Resources during the period of maximum oxythermal stress (July 26th to Aug 24th) in 6 years, between 2009-2024, also indicated suitable oxythermal habitat in all years surveyed, with the least favorable conditions recorded in 2016 when the suitable oxythermal habitat layer was 9.9 feet thick. When adequate oxythermal habitat is not available, Cisco are squeezed into unfavorable, warmer water conditions and experience higher levels of stress.
Minnesota DNR survey narrative, .
All Minnesota stockings · every Minnesota lake with a page · state CSV · this lake on DNR LakeFinder
Stocking rows, depths, accesses and survey figures are Minnesota DNR LakeFinder data as of 2026-09-02; contours are the DNR bathymetric survey. Regulations, slot limits and special rules are on the DNR page linked above, not here.
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