Mary Lake (Crow Wing County)
Crow Wing County, Minnesota - DNR stocking history, depth and survey data
Minnesota · Minnesota Department of Natural Resources (DNR) · DOW 18018500
DNR records show 4 stocking entries at Mary Lake (Crow Wing County) since 2017, most recently walleye fingerlings in 2025 (1,890 fish).
- Mary Lake (Crow Wing County) has 4 DNR stocking records across 4 years (2017-2025): walleye (4).
- The most-stocked species by count is walleye: 7,290 fish on record.
- Maximum depth 34 ft; surface area 413 acres, 126 littoral acres, 4.7 miles of shoreline, per the DNR lake survey.
- Average water clarity (Secchi depth) 3.5 ft.
- Fish species DNR lists here: black bullhead, black crappie, bluegill, bowfin (dogfish), brown bullhead, largemouth bass, northern pike, pumpkinseed, rock bass, walleye, white sucker, yellow bullhead, and 1 more.
- 1 public access on the DNR list.
- Most recent DNR fish survey: (targeted survey).
- Crow Wing County, nearest town Emily; DNR lake number (DOW) 18018500.
Depth map
Bathymetric contours from the Minnesota DNR lake survey mapped 8/12/1970 (orig map); depths in feet. Simplified for the web; not for navigation.
Stocking history
| Year | Species | Size | Number | Pounds |
|---|---|---|---|---|
| 2025 | Walleye1 | fingerlings | 1,890 | 126.0 |
| 2021 | Walleye1 | fingerlings | 2,160 | 120.0 |
| 2020 | Walleye1 | fingerlings | 1,800 | 100.0 |
| 2017 | Walleye1 | fingerlings | 1,440 | 90.0 |
1 fish purchased and stocked by private citizens and sporting groups.
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 |
|---|---|---|
| O | UKN | - Access via the Little Pine River on the northeast end of Emily Lake. |
DNR fish survey, 2024
| Species | Gear | Catch per net | Total catch | Avg lb |
|---|---|---|---|---|
| Bluegill | 15-ft beach seine | 44.67 | 134 | 0.00 |
| Black crappie | 15-ft beach seine | 0.67 | 2 | 0.00 |
| Yellow perch | 15-ft beach seine | 0.67 | 2 | 0.00 |
| Largemouth bass | 15-ft beach seine | 0.33 | 1 | 0.00 |
| Pumpkinseed | 15-ft beach seine | 0.33 | 1 | 0.00 |
| Rock bass | 15-ft beach seine | 0.33 | 1 | 0.00 |
| Bluegill | 50-ft beach seine | 22.86 | 160 | 0.00 |
| Largemouth bass | 50-ft beach seine | 1.86 | 13 | 0.00 |
| Yellow perch | 50-ft beach seine | 1.86 | 13 | 0.00 |
| Spottail shiner | 50-ft beach seine | 1.00 | 7 | 0.00 |
| Black crappie | 50-ft beach seine | 0.71 | 5 | 0.00 |
| Blacknose shiner | 50-ft beach seine | 0.29 | 2 | 0.00 |
| Golden shiner | 50-ft beach seine | 0.29 | 2 | 0.00 |
| Johnny darter | 50-ft beach seine | 0.29 | 2 | 0.00 |
| Bluegill | Backpack electrofishing | 17.50 | 19 | 0.00 |
| Yellow perch | Backpack electrofishing | 0.92 | 1 | 0.00 |
| Rock bass | Backpack electrofishing | 0.92 | 1 | 0.00 |
| Bluegill | Standard trap nets | 3.88 | 31 | 0.21 |
| Black crappie | Standard trap nets | 3.62 | 29 | 0.23 |
| Bowfin (dogfish) | Standard trap nets | 1.12 | 9 | 3.77 |
| Yellow bullhead | Standard trap nets | 0.88 | 7 | 0.73 |
| Yellow perch | Standard trap nets | 0.62 | 5 | 0.14 |
| Walleye | Standard trap nets | 0.50 | 4 | 1.08 |
| Black bullhead | Standard trap nets | 0.38 | 3 | 0.12 |
| Northern pike | Standard trap nets | 0.38 | 3 | 2.00 |
Catch per net (CPUE) is the DNR survey's count per gill net or trap net set; higher means more of that species were sampled, not a fishing forecast. Top species per gear shown; where we have no verified common name for a DNR code, the code itself is shown.
A targeted survey of nearshore fish species in Mary Lake was conducted beginning on July 1, 2024, by Index of Biological Integrity (IBI) Program staff. Sampling sites were evenly spaced around the lake, and each was sampled by backpack electrofishing and seining with a 50-foot or 15-foot seine, where possible. Backpack electrofishing was completed at all 10 sampling stations. A 50-foot seine was used to sample 7 stations and a 15-foot seine was used at 3 stations. Nearshore sampling captured 10 species of fish, including 2 species that are intolerant of disturbance (Blacknose Shiner and Rock Bass). A concurrent summer trap net survey was also conducted by IBI Program staff. Nine trap nets were set along the shoreline in locations that encompassed multiple habitat types. Trap net sampling captured 14 species of fish, including 1 species that is intolerant of disturbance (Rock Bass). Bluegill and Black Crappie comprised a majority of the catch by number, whereas Bowfin comprised a majority by biomass. Northern Pike, Walleye, White sucker, and Yellow Bullhead were few in number, but each species comprised a significant proportion of the trap net biomass. The nearshore and trap net data were combined with gill net data from a survey conducted in July of 2023 to describe the fish community and provide a fish-based IBI (FIBI) score. The FIBI uses fish community data to measure a lake's health, and the types of fish species present can help identify any stressors that may be negatively affecting the lake environment. In Minnesota lakes, certain fish species cannot survive without clean water and a healthy habitat (e.g., Blackchin Shiner, Iowa Darter, and Rock Bass), while other species are tolerant of degraded conditions (e.g., Green Sunfish and Common Carp). The FIBI score, composed of several fish community diversity and composition metrics, indicates the overall health of a lake by comparing it to what is expected for a healthy lake. For additional information on the FIBI, search for "lake index of biological integrity" on the mndnr.gov website. Results from this survey provide evidence that the fish community in Mary Lake is adversely impacted by stressors, as indicated by an FIBI score near the impairment threshold for aquatic life use determined for similar lakes. The survey results will be considered when the biological health of the lake is assessed during the Pine River Watershed assessment process, which will be completed in coordination with MN Pollution Control Agency. Mary Lake supports several popular game fish species, including Black Crappie…
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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