Twenty-one Lake
Otter Tail County, Minnesota, near Erhard. DNR lake ID 56072800.
Twenty-one Lake is a 142.1-acre lake in Otter Tail County, Minnesota, near Erhard. Its deepest point reaches 47 ft, and about 35% of the lake is shallower than 15 feet. Summer water clarity averages 12.6 feet in Minnesota Pollution Control Agency monitoring. It is not on the DNR infested waters list as of September 2026. DNR surveys document northern pike, largemouth bass, black crappie, bluegill.
Buying or selling on Twenty-one 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.
Tell us about your dream home on Twenty-one LakeWhat’s my Twenty-one Lake property worth?Call (218) 656-6469
Quick facts
| DNR lake ID | 56072800 |
|---|---|
| County | Otter Tail County, near Erhard |
| Surface area | 142.1 acres |
| Maximum depth | 47 ft |
| Share under 15 ft | 35% |
| Water clarity (summer) | 12.6 ft through 2025 (satellite estimate) |
| 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 12.6 ft.
Fishing on Twenty-one Lake
The most recent DNR standard fish survey was in 2018 (8 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 |
|---|---|---|---|
| Northern pike | gill | 7.5 | 2.8 to 8.7 |
| Northern pike | trap | 0.89 | n/a |
| Black crappie | gill | 0.33 | 0.5 to 2.9 |
| Black crappie | trap | 3.11 | 0.5 to 3.3 |
| Bluegill | gill | 0.5 | n/a |
| Bluegill | trap | 33.89 | 5.7 to 40.5 |
| Largemouth bass | gill | 1.83 | 0.3 to 1.5 |
| Largemouth bass | trap | 4.44 | 0.3 to 1.6 |
| Pumpkinseed | trap | 0.78 | 1.3 to 6.3 |
| Hybrid sunfish | gill | 0.17 | n/a |
| Hybrid sunfish | trap | 4.33 | n/a |
Largest fish measured in recent DNR samples: Northern pike 36.0 in (2018), Largemouth bass 16.0 in (2018).
Game and panfish documented since 2005: Northern pike, Largemouth bass, Black crappie, Bluegill, Pumpkinseed, Hybrid sunfish, Yellow bullhead, Brown bullhead, 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
- Twentyone Lake, Maplewood State Park: 1 natural launch ramp. In Maplewood State Park, Enter from Co Rd 24, south side of park Directions
DNR water access records (2023). Confirm current conditions with the DNR.
Nearby lakes
- Crystal Lake 1.5 mi, Otter Tail County
- Bass Lake 2.2 mi, Otter Tail County
- Venstrom Lake 2.2 mi, Otter Tail County
- Eddy Lake 2.4 mi, Otter Tail County
- Beers Lake 2.6 mi, Otter Tail County
- Brackett Lake 2.6 mi, Otter Tail County
- Grass Lake 2.6 mi, Otter Tail County
- Anderson Lake 2.7 mi, Otter Tail County
Questions about Twenty-one Lake
How deep is Twenty-one Lake?
Twenty-one Lake reaches a maximum depth of 47 ft according to Minnesota DNR records. About 35% of the lake is shallower than 15 feet.
How big is Twenty-one Lake?
Twenty-one Lake covers about 142.1 acres in Otter Tail County, Minnesota.
How clear is Twenty-one Lake?
Summer water clarity on Twenty-one Lake averages 12.6 feet (Secchi depth) in MPCA monitoring through 2025.
Does Twenty-one Lake have zebra mussels or other invasive species?
Twenty-one 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 Twenty-one Lake?
Minnesota DNR surveys document northern pike, largemouth bass, black crappie, bluegill, pumpkinseed, hybrid sunfish, yellow bullhead, brown bullhead, black bullhead in Twenty-one Lake. The most recent standard survey was in 2018.
Where is the public boat access on Twenty-one Lake?
Twenty-one Lake has 1 public water access site on DNR record: Twentyone Lake, Maplewood State Park.
Are there lake homes for sale on Twenty-one Lake?
Homes on Twenty-one 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 Twenty-one Lake and nearby lakes, including off-market opportunities when available.
What is it like to live on Twenty-one Lake?
Small, quiet water suited to paddling and fishing, about 35% shallow shoreline under 15 feet, and summer clarity around 12.6 feet. Conditions vary by property, so walk the frontage and ask us what similar homes have sold for.
Are there special fishing regulations on Twenty-one Lake?
No lake-specific regulation was found for Twenty-one Lake in Minnesota Rules or the DNR sunfish list. Statewide and zone regulations apply.
Ask us about Twenty-one Lake
Whether you’re buying, selling, or just curious, our team works Otter Tail County lakes every day. Send us a note or call (218) 656-6469.
Sources: Minnesota DNR LakeFinder records, DNR fish surveys (latest 2018), 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.