South Twin Lake
Beltrami County, Minnesota, near Bemidji. DNR lake ID 04005300.
South Twin Lake is a 221.6-acre lake in Beltrami County, Minnesota, near Bemidji. Its deepest point reaches 45 ft, and about 34% of the lake is shallower than 15 feet. Summer water clarity averages 17.8 feet in Minnesota Pollution Control Agency monitoring, which places it in the oligotrophic nutrient class. It is not on the DNR infested waters list as of September 2026. DNR surveys document walleye, northern pike, largemouth bass, black crappie, bluegill, yellow perch.
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Quick facts
| DNR lake ID | 04005300 |
|---|---|
| County | Beltrami County, near Bemidji |
| Surface area | 221.6 acres |
| Maximum depth | 45 ft |
| Share under 15 ft | 34% |
| Water clarity (summer) | 17.8 ft through 2025 |
| Phosphorus (summer) | 14.0 µg/L |
| Algae, chlorophyll-a (summer) | 2.3 µg/L |
| Nutrient class | Oligotrophic |
| Clarity trend | Steady (2016 to 2025) |
| Invasive species | Not on DNR infested waters list (Sept 2026) |
| Public water accesses | 1 |
Water quality
Summer averages from Minnesota Pollution Control Agency monitoring through 2025: clarity 17.8 ft, phosphorus 14.0 µg/L, algae (chlorophyll-a) 2.3 µg/L. Using the Carlson trophic state index, South Twin Lake rates as oligotrophic. Summer clarity trend 2016 to 2025: steady.
Fishing on South Twin Lake
The most recent DNR standard fish survey was in 2016 (10 years ago). Catch per net is compared with the DNR’s typical range for lakes of the same type.
| Species | Net | Catch per net | Typical range |
|---|---|---|---|
| Walleye | gill | 2.5 | 1.0 to 5.0 |
| Walleye | trap | 0.89 | 0.2 to 0.7 |
| Northern pike | gill | 8.83 | 2.2 to 8.7 |
| Northern pike | trap | 0.56 | n/a |
| Yellow perch | gill | 3.83 | 1.5 to 13.8 |
| Black crappie | gill | 2.0 | 0.3 to 1.7 |
| Black crappie | trap | 1.22 | 0.5 to 2.2 |
| Bluegill | gill | 10.83 | n/a |
| Bluegill | trap | 15.44 | 7.7 to 43.4 |
| Largemouth bass | gill | 1.67 | 0.5 to 1.7 |
| Largemouth bass | trap | 0.56 | 0.4 to 1.5 |
| Pumpkinseed | gill | 0.83 | n/a |
| Pumpkinseed | trap | 2.67 | 1.4 to 5.9 |
| Rock bass | gill | 1.83 | 0.7 to 4.4 |
| Rock bass | trap | 3.11 | 0.8 to 3.7 |
| Hybrid sunfish | trap | 0.67 | n/a |
Walleye catch was within the typical range for similar lakes in that survey.
Largest fish measured in recent DNR samples: Northern pike 34.0 in (2016), Largemouth bass 19.0 in (2016), Walleye 30.0 in (2016).
Game and panfish documented since 2005: Walleye, Northern pike, Largemouth bass, Black crappie, Bluegill, Yellow perch, Pumpkinseed, Hybrid sunfish, Rock bass, White sucker, Black bullhead.
Fishing regulations
No lake-specific regulation found in Minnesota Rules or the DNR sunfish list. Statewide and zone regulations apply.
Regulations change. Confirm with the DNR before fishing.
Invasive species
Not on the Minnesota DNR infested waters list as of September 2026. That means no confirmed listing, not a guarantee the lake is free of invasive species.
Public boat access
- South Twin Lake: 1 concrete slab launch ramp, 3 trailer spaces. 8 miles east of Turtle River, 1.5 miles off County Road 22 on the southeast tip of south shore. Directions
DNR water access records (2023). Confirm current conditions with the DNR.
Nearby lakes
- North Twin Lake 0.8 mi, Beltrami County
- Bass Lake 1.6 mi, Beltrami County
- Rice Pond 2.7 mi, Beltrami County
- Gull Lake 2.8 mi, Beltrami County
- Pimushe Lake 3.1 mi, Beltrami County
- Meadow Lake 3.4 mi, Beltrami County
- Webster Lake 3.7 mi, Beltrami County
- Benjamin Lake 4.2 mi, Beltrami County
Questions about South Twin Lake
How deep is South Twin Lake?
South Twin Lake reaches a maximum depth of 45 ft according to Minnesota DNR records. About 34% of the lake is shallower than 15 feet.
How big is South Twin Lake?
South Twin Lake covers about 221.6 acres in Beltrami County, Minnesota.
How clear is South Twin Lake?
Summer water clarity on South Twin Lake averages 17.8 feet (Secchi depth) in MPCA monitoring through 2025. Its trophic state is oligotrophic.
Does South Twin Lake have zebra mussels or other invasive species?
South Twin Lake is not on the Minnesota DNR infested waters list as of September 2026. That means there is no confirmed listing; it is not a guarantee the lake is free of invasive species.
What fish are in South Twin Lake?
Minnesota DNR surveys document walleye, northern pike, largemouth bass, black crappie, bluegill, yellow perch, pumpkinseed, hybrid sunfish, rock bass, white sucker in South Twin Lake. The most recent standard survey was in 2016.
Where is the public boat access on South Twin Lake?
South Twin Lake has 1 public water access site on DNR record: South Twin Lake.
How is the walleye population on South Twin Lake?
In Minnesota DNR net surveys from 1995 to 2016, walleye numbers on South Twin Lake ran mostly within the typical range for similar lakes. Nets measure how many fish a lake holds, not where they’re biting, so local guides are the best source for current fishing.
Are there lake homes for sale on South Twin Lake?
Homes on South Twin Lake come up for sale throughout the year, and some sell before they’re ever publicly advertised. Tell us what you’re looking for and our agents will run a custom search and send you matching homes on South Twin Lake and nearby lakes, including off-market opportunities when available.
What is it like to live on South Twin Lake?
Small, quiet water suited to paddling and fishing, about 34% shallow shoreline under 15 feet, and summer clarity around 17.8 feet. Conditions vary by property, so walk the frontage and ask us what similar homes have sold for.
Are there special fishing regulations on South Twin Lake?
No lake-specific regulation was found for South Twin Lake in Minnesota Rules or the DNR sunfish list. Statewide and zone regulations apply.
Ask us about South Twin Lake
Whether you’re buying, selling, or just curious, our team works Beltrami County lakes every day. Send us a note or call (218) 656-6469.
Sources: Minnesota DNR LakeFinder records, DNR fish surveys (latest 2016), DNR infested waters list (Sept 2026), Minnesota Rules 6264.0400 (April 2026), MPCA monitoring via the Water Quality Portal, DNR water access records (2023), LAGOS-US. Lakewide information from public data; it does not describe any specific property. Verify shoreline, bottom type, and depth at any frontage.