South Twin Lake (St. Louis County)
St. Louis County, Minnesota - DNR stocking history, depth and survey data
Minnesota · Minnesota Department of Natural Resources (DNR) · DOW 69042000
DNR records show 5 stocking entries at South Twin Lake (St. Louis County) since 2017, most recently walleye fingerlings in 2025 (1,886 fish).
- South Twin Lake (St. Louis County) has 5 DNR stocking records across 5 years (2017-2025): walleye (5).
- The most-stocked species by count is walleye: 12,490 fish on record.
- Maximum depth 48 ft; surface area 118 acres, 46 littoral acres, 2.0 miles of shoreline, per the DNR lake survey.
- Average water clarity (Secchi depth) 4.0 ft.
- Fish species DNR lists here: black bullhead, black crappie, bluegill, burbot, northern pike, walleye, white sucker, yellow bullhead, yellow perch.
- 1 public access on the DNR list.
- Most recent DNR fish survey: (standard survey).
- St. Louis County, nearest town Aurora; DNR lake number (DOW) 69042000.
Depth map
Bathymetric contours from the Minnesota DNR lake survey (get source); depths in feet. Simplified for the web; not for navigation.
Stocking history
| Year | Species | Size | Number | Pounds |
|---|---|---|---|---|
| 2025 | Walleye2 | fingerlings | 1,886 | 92.0 |
| 2023 | Walleye2 | fingerlings | 2,668 | 92.0 |
| 2021 | Walleye2 | fingerlings | 3,128 | 92.0 |
| 2019 | Walleye2 | fingerlings | 2,968 | 92.0 |
| 2017 | Walleye2 | fingerlings | 1,840 | 92.0 |
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 |
|---|---|---|
| gravel ramp | Minnesota DNR | - Large parking area adjacent to access. |
DNR fish survey, 2024
| Species | Gear | Catch per net | Total catch | Avg lb |
|---|---|---|---|---|
| Black crappie | Standard trap nets | 15.44 | 139 | 0.41 |
| Bluegill | Standard trap nets | 2.78 | 25 | 0.34 |
| Yellow bullhead | Standard trap nets | 2.78 | 25 | 0.69 |
| Northern pike | Standard trap nets | 1.67 | 15 | 1.32 |
| Walleye | Standard trap nets | 1.33 | 12 | 0.77 |
| Black bullhead | Standard trap nets | 0.33 | 3 | 0.79 |
| Yellow perch | Standard trap nets | 0.11 | 1 | 0.13 |
| Yellow bullhead | Standard gill nets | 1.50 | 9 | 0.56 |
| White sucker | Standard gill nets | 0.67 | 4 | 0.72 |
| Walleye | Standard gill nets | 0.50 | 3 | 2.45 |
| Burbot | Standard gill nets | 0.33 | 2 | 0.90 |
| Yellow perch | Standard gill nets | 0.33 | 2 | 0.21 |
| Northern pike | Standard gill nets | 0.17 | 1 | 1.78 |
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.
South Twin Lake is a 118-acre lake located six miles south of Aurora. It is accessed by a gravel ramp on the lake's south shore with a large parking area available for several vehicles with trailers. The lake has a maximum depth of 48 feet and dark brown water. South Twin was thermally stratified on July 15, 2024, with a surface temperature of 77 F and a bottom temperature of 47 F. Oxygen levels were adequate for gamefish throughout the water column. There is one inlet on the lakes southeast side and the lone outlet flows out the north side to North Twin Lake. Shoreline substrates are mostly sand and rubble, and aquatic plants grow to a depth of 8 feet. There is also a popular swimming beach and picnic area on the northwest shore. The current stocking strategy is for walleye fingerlings to be stocked on a generally every other year rotation. More recently (the past four stocking events from 2015 to 2021) an average of 2,697 walleye fingerlings were stocked every odd year. The overall gillnet catch rate for all fish combined was 3.5 fish/net which was below the average of past surveys on South Twin Lake. The yield was 3.2 pounds/net, which was also lower than average. Fish species sampled were yellow bullhead, white sucker, walleye, yellow perch, burbot, and northern pike. Trap nets caught fish at an overall rate of 24.4 fish/net which was better than average compared to past surveys on South Twin Lake. Yield was 12.7 pounds/net which was also higher than the historic average. Trap net catches were dominated by black crappie, with modest numbers of bullheads, bluegill, northern pike, and a single yellow perch also sampled. Three walleye were sampled in gill nets for a catch rate of 0.5 fish/net, although an additional 12 were also caught in trap nets (1.3 fish/net). The gillnet catch rate was the lowest catch rate on record for the lake. The trap net catch rate, however, was slightly above average compared to past surveys on South Twin. Walleye lengths from the combined catch ranged from 7 to almost 24 inches with an average of 13 inches. Fish were aged up to seven years old and all the aged fish came from stocked years. Black crappie were sampled in trap nets at a rate of 15.4 fish/net, well above average for the lake. Lengths ranged from just under 5 inches to 12 inches with an average of 9 inches. Almost 80% of the crappie sampled were 8 inches or larger, which should provide ample opportunities for anglers on the lake to catch and harvest some fish. Growth rates were above average for the area, as it took about four years for fish to reach 8 inches.…
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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