Blackduck Lake
Beltrami County, Minnesota - DNR stocking history, depth and survey data
Minnesota · Minnesota Department of Natural Resources (DNR) · DOW 04006900
DNR records show 5 stocking entries at Blackduck Lake since 2017, most recently walleye fry in 2024 (1,379,000 fish).
- Blackduck Lake has 5 DNR stocking records across 5 years (2017-2024): walleye (5).
- The most-stocked species by count is walleye: 6,914,000 fish on record.
- Maximum depth 28 ft; surface area 2,711 acres, 1,374 littoral acres, 13.3 miles of shoreline, per the DNR lake survey.
- Average water clarity (Secchi depth) 6.9 ft.
- Fish species DNR lists here: black bullhead, black crappie, bluegill, brown bullhead, burbot, freshwater drum, hybrid sunfish, lake whitefish, largemouth bass, northern pike, pumpkinseed, rock bass, and 4 more.
- 1 public access on the DNR list.
- Most recent DNR fish survey: (targeted survey).
- Beltrami County, nearest town Blackduck; DNR lake number (DOW) 04006900.
Depth map
Bathymetric contours from the Minnesota DNR lake survey mapped 7/13/1949 (orig map); depths in feet. Simplified for the web; not for navigation.
Stocking history
| Year | Species | Size | Number | Pounds |
|---|---|---|---|---|
| 2024 | Walleye | fry | 1,379,000 | 13.1 |
| 2023 | Walleye | fry | 1,376,000 | 12.3 |
| 2021 | Walleye | fry | 1,376,000 | 12.0 |
| 2018 | Walleye | fry | 1,401,000 | 11.6 |
| 2017 | Walleye | fry | 1,382,000 | 11.8 |
Public accesses
| Type | Owner | Where |
|---|---|---|
| concrete ramp | Minnesota DNR | ACCESS ON THE EAST SHORE AT THE CITY PARK OFF CSA 30; T.149; R.31; S.11). - ACCESS ON THE EAST SHORE AT THE CITY PARK OFF CSA 30; T.149; R.31; S.11). |
DNR fish survey, 2025
Minnesota DNR Fisheries IBI program staff conducted an assessment of lakeshore habitat on Blackduck Lake on August 21st, 2025, following the Score the Shore survey protocols. The assessment consisted of 106 survey sites evenly spaced 200 meters around the lake. Assessments were made in three habitat zones: Shoreline Zone (the shore-water interface to the top of the natural bank), Shoreland Zone (land-ward from shoreline to development structure or 100 feet), and Aquatic Zone (lake-ward 50 feet of shoreline). The average lakewide habitat score was 80.2 (+/- 1.6) out of 100 possible. A score of 80.2 indicates the lakewide shoreline condition is Moderately High (80-84.9). However, developed sites generally had poor habitat quality. Approximately 33 percent of the sites were developed with a mean score of 63.1 (+/- 3.4) indicating shoreline habitat quality of developed sites is Poor (50-65.9), while undeveloped sites had a mean score of 88.6 (+/- 0.5) with High (85-91.9) habitat quality.
Minnesota DNR survey narrative, .
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