Long Lake (Isanti County)
Isanti County, Minnesota - DNR stocking history, depth and survey data
Minnesota · Minnesota Department of Natural Resources (DNR) · DOW 30007200
DNR records show 9 stocking entries at Long Lake (Isanti County) since 2017, most recently walleye fry in 2025 (390,000 fish).
- Long Lake (Isanti County) has 9 DNR stocking records across 7 years (2017-2025): walleye (7), black crappie (1), bluegill sunfish (1).
- The most-stocked species by count is walleye: 2,730,000 fish on record.
- Maximum depth 15 ft, mean depth 5 ft; surface area 387 acres, 382 littoral acres, 5.5 miles of shoreline, per the DNR lake survey.
- Average water clarity (Secchi depth) 1.5 ft.
- Fish species DNR lists here: black bullhead, black crappie, bluegill, bowfin (dogfish), burbot, common carp, green sunfish, hybrid sunfish, largemouth bass, northern pike, pumpkinseed, walleye, and 3 more.
- 2 public accesses on the DNR list.
- Most recent DNR fish survey: (targeted survey).
- Isanti County, nearest town Isanti; DNR lake number (DOW) 30007200.
Depth map
Bathymetric contours from the Minnesota DNR lake survey mapped 5/7/1956 (orig map); depths in feet. Simplified for the web; not for navigation.
Stocking history
| Year | Species | Size | Number | Pounds |
|---|---|---|---|---|
| 2025 | Walleye | fry | 390,000 | 3.6 |
| 2024 | Walleye | fry | 390,000 | 3.4 |
| 2023 | Walleye | fry | 390,000 | 3.4 |
| 2022 | Walleye | fry | 390,000 | 3.5 |
| 2021 | Walleye | fry | 390,000 | 3.5 |
| 2019 | Black Crappie1 | fingerlings | 3,220 | 57.0 |
| 2019 | Bluegill Sunfish1 | fingerlings | 1,720 | 32.0 |
| 2019 | Walleye | fry | 390,000 | 3.2 |
| 2017 | Walleye | fry | 390,000 | 3.5 |
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 |
|---|---|---|
| earthen ramp | TOW | - A township administered access on the west-central side of the lake in S32. It has a sand ramp and parking along the gravel road. |
| concrete ramp | Minnesota DNR | - A DNR administered access on the Northeast side of the lake. |
DNR fish survey, 2022
| Species | Gear | Catch per net | Total catch | Avg lb |
|---|---|---|---|---|
| Black bullhead | Standard trap nets | 461.25 | 3,690 | 0.13 |
| Bluegill | Standard trap nets | 4.62 | 37 | 0.25 |
| Black crappie | Standard trap nets | 4.00 | 32 | 14.49 |
| Common carp | Standard trap nets | 1.88 | 15 | 4.44 |
| Pumpkinseed | Standard trap nets | 0.38 | 3 | 0.11 |
| Northern pike | Standard trap nets | 0.38 | 3 | 3.05 |
| Largemouth bass | Standard trap nets | 0.38 | 3 | 2.57 |
| White sucker | Standard trap nets | 0.12 | 1 | 0.04 |
| Brassy minnow | 50-ft beach seine | 62.29 | 436 | 0.00 |
| Black bullhead | 50-ft beach seine | 17.71 | 124 | 0.00 |
| Bluegill | 50-ft beach seine | 4.86 | 34 | 0.00 |
| Yellow perch | 50-ft beach seine | 2.86 | 20 | 0.00 |
| Johnny darter | 50-ft beach seine | 2.43 | 17 | 0.00 |
| Common shiner | 50-ft beach seine | 1.00 | 7 | 0.00 |
| Fathead minnow | 50-ft beach seine | 0.86 | 6 | 0.00 |
| Central mudminnow | 50-ft beach seine | 0.71 | 5 | 0.00 |
| Brassy minnow | Backpack electrofishing | 56.14 | 63 | 0.00 |
| Black bullhead | Backpack electrofishing | 32.97 | 37 | 0.00 |
| Fathead minnow | Backpack electrofishing | 19.60 | 22 | 0.00 |
| Central mudminnow | Backpack electrofishing | 16.04 | 18 | 0.00 |
| Green sunfish | Backpack electrofishing | 7.13 | 8 | 0.00 |
| Hybrid sunfish | Backpack electrofishing | 6.24 | 7 | 0.00 |
| Johnny darter | Backpack electrofishing | 3.56 | 4 | 0.00 |
| Bluegill | Backpack electrofishing | 2.67 | 3 | 0.00 |
| Black bullhead | 15-ft beach seine | 3.67 | 11 | 0.00 |
| Brassy minnow | 15-ft beach seine | 2.33 | 7 | 0.00 |
| Johnny darter | 15-ft beach seine | 0.33 | 1 | 0.00 |
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 Long Lake was conducted on June 14-16, 2022 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 seine, where possible. Backpack electrofishing was completed at all ten sampling stations. Similarly, a 50-foot seine was used to sample seven stations, a 15-foot seine was used at threes stations. Nearshore sampling captured 15 species of fish including two species that are intolerant of disturbance (i.e., Blacknose Shiner and Iowa Darter) and six species that are tolerant of disturbance (i.e., Black Bullhead, Common Carp, Fathead Minnow, and Green Sunfish). A concurrent summer trap net survey was conducted by IBI Program Staff. Nine trap nets were set along the shoreline and in shallow offshore locations that encompassed multiple habitat types. Black bullhead comprised a majority of the trap net catch by number and the majority of the catch by biomass. The number of Black Bullhead sampled per net was well above the 75% quartile for similar Lake Class 42 lakes. The nearshore and trap net data were combined with gill net data from a July 2021 survey 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). 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. Data from this survey indicates that the fish community in Long Lake is adversely impacted by stressors as indicated by a FIBI score below the impairment threshold for aquatic life use determined for similar lakes. Data from this survey will contribute biological information about the health of the fish community to the Rum River Watershed assessment process in coordination with MN Pollution Control Agency.
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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