Long Lake
Otter Tail County, Minnesota, near Underwood. DNR lake ID 56042800.
Long Lake is a 204.2-acre lake in Otter Tail County, Minnesota, near Underwood. Its deepest point reaches 24 ft, and about 74% of the lake is shallower than 15 feet. Summer water clarity averages 3.5 feet in Minnesota Pollution Control Agency monitoring. It is not on the DNR infested waters list as of September 2026.
Buying or selling on Long 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 | 56042800 |
|---|---|
| County | Otter Tail County, near Underwood |
| Surface area | 204.2 acres |
| Maximum depth | 24 ft |
| Share under 15 ft | 74% |
| Water clarity (summer) | 3.5 ft through 2025 (satellite estimate) |
| Invasive species | Not on DNR infested waters list (Sept 2026) |
| Public water accesses | 0 |
Water quality
Summer averages from Minnesota Pollution Control Agency monitoring through 2025: clarity 3.5 ft.
Fishing on Long Lake
The most recent DNR standard fish survey was in 1991 (35 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 | 1.0 | 1.2 to 5.3 |
| Walleye | trap | 0.22 | 0.3 to 0.8 |
| Northern pike | gill | 2.0 | 2.3 to 9.2 |
| Northern pike | trap | 0.78 | n/a |
| Yellow perch | gill | 2.0 | 3.7 to 28.4 |
| Yellow perch | trap | 1.0 | 0.5 to 3.7 |
| Black crappie | trap | 1.22 | 0.9 to 8.0 |
| Bluegill | trap | 8.56 | 5.9 to 43.3 |
| Largemouth bass | trap | 0.22 | 0.3 to 1.0 |
| Pumpkinseed | trap | 1.22 | 1.5 to 9.1 |
| Hybrid sunfish | gill | 0.33 | n/a |
| Hybrid sunfish | trap | 5.0 | n/a |
Walleye catch was below the typical range for similar lakes in that survey.
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
No public water access on DNR record.
Nearby lakes
- Dane Lake 2.0 mi, Otter Tail County
- German Lake 2.1 mi, Otter Tail County
- Stalker Lake 2.2 mi, Otter Tail County
- Fiske Lake 2.7 mi, Otter Tail County
- Steenerson Lake 3.1 mi, Otter Tail County
- Johannes Lake 3.4 mi, Otter Tail County
- South Turtle Lake 3.6 mi, Otter Tail County
- Long Lake 4.0 mi, Otter Tail County
Questions about Long Lake
How deep is Long Lake?
Long Lake reaches a maximum depth of 24 ft according to Minnesota DNR records. About 74% of the lake is shallower than 15 feet.
How big is Long Lake?
Long Lake covers about 204.2 acres in Otter Tail County, Minnesota.
How clear is Long Lake?
Summer water clarity on Long Lake averages 3.5 feet (Secchi depth) in MPCA monitoring through 2025.
Does Long Lake have zebra mussels or other invasive species?
Long 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.
Are there lake homes for sale on Long Lake?
Homes on Long 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 Long Lake and nearby lakes, including off-market opportunities when available.
What is it like to live on Long Lake?
Small, quiet water suited to paddling and fishing, about 74% shallow shoreline under 15 feet, and summer clarity around 3.5 feet. Conditions vary by property, so walk the frontage and ask us what similar homes have sold for.
Are there special fishing regulations on Long Lake?
No lake-specific regulation was found for Long Lake in Minnesota Rules or the DNR sunfish list. Statewide and zone regulations apply.
Ask us about Long 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 1991), 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.