South Twin Lake
Itasca County, Minnesota, near Marble. DNR lake ID 31019100.
South Twin Lake is a 140.8-acre lake in Itasca County, Minnesota, near Marble. Its deepest point reaches 40 ft, and about 45% of the lake is shallower than 15 feet. Summer water clarity averages 14.1 feet in Minnesota Pollution Control Agency monitoring, which places it in the mesotrophic nutrient class. The DNR lists it for Eurasian watermilfoil, flowering rush. DNR surveys document walleye, northern pike, largemouth bass, black crappie, bluegill, yellow perch.
Buying or selling on South Twin Lake? Ask us what lakeshore here actually sells for, which stretches of shoreline buyers compete for, and what’s coming up before it’s listed.
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Quick facts
| DNR lake ID | 31019100 |
|---|---|
| County | Itasca County, near Marble |
| Surface area | 140.8 acres |
| Maximum depth | 40 ft |
| Share under 15 ft | 45% |
| Water clarity (summer) | 14.1 ft through 2022 |
| Phosphorus (summer) | 58.7 µg/L |
| Algae, chlorophyll-a (summer) | 3.1 µg/L |
| Nutrient class | Mesotrophic |
| Invasive species | Eurasian watermilfoil, flowering rush |
| Public water accesses | 0 |
Water quality
Summer averages from Minnesota Pollution Control Agency monitoring through 2022: clarity 14.1 ft, phosphorus 58.7 µg/L, algae (chlorophyll-a) 3.1 µg/L. Using the Carlson trophic state index, South Twin Lake rates as mesotrophic.
Fishing on South Twin Lake
The most recent DNR standard fish survey was in 2008 (18 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 | 0.33 | 1.3 to 5.0 |
| Northern pike | gill | 15.67 | 3.5 to 10.5 |
| Northern pike | trap | 0.22 | n/a |
| Yellow perch | trap | 0.33 | 0.5 to 3.3 |
| Black crappie | gill | 2.83 | 0.6 to 3.5 |
| Black crappie | trap | 0.33 | 0.7 to 3.4 |
| Bluegill | gill | 6.83 | n/a |
| Bluegill | trap | 5.11 | 6.1 to 46.6 |
| Largemouth bass | gill | 1.17 | 0.3 to 1.7 |
| Largemouth bass | trap | 0.56 | 0.3 to 1.3 |
| Tullibee (cisco) | gill | 2.0 | 0.5 to 4.8 |
| Pumpkinseed | gill | 2.0 | n/a |
| Pumpkinseed | trap | 0.22 | 2.0 to 8.5 |
| Rock bass | gill | 1.5 | 0.3 to 1.9 |
| Rock bass | trap | 0.22 | 0.5 to 1.8 |
Walleye catch was below the typical range for similar lakes in that survey.
Largest fish measured in recent DNR samples: Northern pike 27.0 in (2008), Walleye 18.0 in (2008), Largemouth bass 17.0 in (2008).
Game and panfish documented since 2005: Walleye, Northern pike, Largemouth bass, Black crappie, Bluegill, Yellow perch, Pumpkinseed, Rock bass, Tullibee (cisco), Bowfin, Shorthead redhorse, White sucker, Yellow 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
On the Minnesota DNR infested waters list for: Eurasian watermilfoil (listed 2016), flowering rush (listed 2007).
Public boat access
No public water access on DNR record.
Nearby lakes
- North Twin Lake 0.6 mi, Itasca County
- Holman Lake 1.5 mi, Itasca County
- Bass Lake 1.6 mi, Itasca County
- Big Diamond Lake 2.3 mi, Itasca County
- Upper Panasa Lake 2.8 mi, Itasca County
- Lower Panasa Lake 3.3 mi, Itasca County
- Little Sand Lake 3.8 mi, Itasca County
- Snowball Lake 4.6 mi, Itasca County
Questions about South Twin Lake
How deep is South Twin Lake?
South Twin Lake reaches a maximum depth of 40 ft according to Minnesota DNR records. About 45% of the lake is shallower than 15 feet.
How big is South Twin Lake?
South Twin Lake covers about 140.8 acres in Itasca County, Minnesota.
How clear is South Twin Lake?
Summer water clarity on South Twin Lake averages 14.1 feet (Secchi depth) in MPCA monitoring through 2022. Its trophic state is mesotrophic.
Does South Twin Lake have zebra mussels or other invasive species?
The Minnesota DNR infested waters list includes South Twin Lake for Eurasian watermilfoil, flowering rush.
What fish are in South Twin Lake?
Minnesota DNR surveys document walleye, northern pike, largemouth bass, black crappie, bluegill, yellow perch, pumpkinseed, rock bass, tullibee (cisco), bowfin in South Twin Lake. The most recent standard survey was in 2008.
How is the walleye population on South Twin Lake?
In Minnesota DNR net surveys from 1999 to 2008, walleye numbers on South Twin Lake ran mostly below 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 45% shallow shoreline under 15 feet, and summer clarity around 14.1 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 Itasca County lakes every day. Send us a note or call (218) 656-6469.
Sources: Minnesota DNR LakeFinder records, DNR fish surveys (latest 2008), 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.