South Twin Lake (Beltrami County)

Beltrami County, Minnesota - DNR stocking history, depth and survey data

Minnesota · Minnesota Department of Natural Resources (DNR) · DOW 04005300

DNR records show 6 stocking entries at South Twin Lake (Beltrami County) since 2017, most recently walleye adults in 2025 (21 fish).

• South Twin Lake (Beltrami County) has 6 DNR stocking records across 5 years (2017-2025): walleye (6).
• The most-stocked species by count is walleye: 7,512 fish on record.
• Maximum depth 45 ft; surface area 222 acres, 75 littoral acres, 3.1 miles of shoreline, per the DNR lake survey.
• Fish species DNR lists here: black bullhead, black crappie, bluegill, hybrid sunfish, largemouth bass, northern pike, pumpkinseed, rock bass, walleye, white sucker, yellow perch.
• 1 public access on the DNR list.
• Most recent DNR fish survey: June 30, 2025 (targeted survey).
• Beltrami County, nearest town Bemidji; DNR lake number (DOW) 04005300.

Depth map

Bathymetric contours from the Minnesota DNR lake survey; depths in feet. Simplified for the web; not for navigation.

Stocking history

Public accesses

DNR fish survey, 2025

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 South Twin Lake, was conducted on June 30th and July 1st, 2025, by Lake Biological Monitoring and Assessment (LBMA) 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. Similarly, a 50-foot seine was used to sample 10 stations. Nearshore sampling captured 13 species of fish including six species that are intolerant of disturbance (i.e., Banded Killifish, Blackchin Shiner, Blacknose Shiner, Iowa Darter, Mimic Shiner, and Rock Bass) and no species that are tolerant of disturbance. A concurrent summer trap net survey was also conducted by LBMA Program Staff. Nine trap nets were set along the shoreline and in shallow offshore locations that encompassed multiple habitat types. Trap net sampling captured eight species of fish, including one that is intolerant of disturbance (i.e., Rock Bass). Bluegill comprised a majority of the trap net catch by number and biomass. The nearshore and trap net data were combined with gill net data from a July 2024 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., Black Bullhead and Fathead Minnow). 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. In addition to fish sampling, LBMA program staff conducted an assessment of lakeshore habitat on South Twin Lake on June 14th, 2025, following the Score the Shore survey protocols. The assessment consisted of 32 survey sites evenly spaced 150 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 87.3 (+/- 2.9) out of 100 possible.…

Minnesota DNR survey narrative, June 30, 2025.

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