Long Lake
Otter Tail County, Minnesota, near Ottertail. DNR lake ID 56021000.
Long Lake is a 1,173-acre lake in Otter Tail County, Minnesota, near Ottertail. Summer water clarity averages 2.5 feet in Minnesota Pollution Control Agency monitoring, which places it in the eutrophic nutrient class. 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.
Tell us about your dream home on Long LakeWhat’s my Long Lake property worth?Call (218) 656-6469
Quick facts
| DNR lake ID | 56021000 |
|---|---|
| County | Otter Tail County, near Ottertail |
| Surface area | 1,173 acres |
| Maximum depth | Not surveyed |
| Share under 15 ft | Not surveyed |
| Water clarity (summer) | 2.5 ft through 2025 |
| Phosphorus (summer) | 69.7 µg/L |
| Algae, chlorophyll-a (summer) | 32.7 µg/L |
| Nutrient class | Eutrophic |
| Clarity trend | Clearer (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 2.5 ft, phosphorus 69.7 µg/L, algae (chlorophyll-a) 32.7 µg/L. Using the Carlson trophic state index, Long Lake rates as eutrophic. Summer clarity trend 2016 to 2025: clearer.
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
- Long Lake: 1 concrete slab launch ramp, 8 trailer spaces. 2 mi NW of the city of Ottertail on Cnty Rd 1 to SW shore. Directions
DNR water access records (2023). Confirm current conditions with the DNR.
Nearby lakes
- Alice Lake 2.1 mi, Otter Tail County
- Head Lake 2.5 mi, Otter Tail County
- Walker Lake 2.6 mi, Otter Tail County
- Pelican Bay 3.0 mi, Otter Tail County
- Round Lake 3.3 mi, Otter Tail County
- Buchanan Lake 3.4 mi, Otter Tail County
- Otter Tail Lake 3.8 mi, Otter Tail County
- Donalds Lake 4.1 mi, Otter Tail County
Questions about Long Lake
How big is Long Lake?
Long Lake covers about 1,173 acres in Otter Tail County, Minnesota.
How clear is Long Lake?
Summer water clarity on Long Lake averages 2.5 feet (Secchi depth) in MPCA monitoring through 2025. Its trophic state is eutrophic.
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.
Where is the public boat access on Long Lake?
Long Lake has 1 public water access site on DNR record: Long Lake.
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?
A mid-size lake with room for boating and fishing, and summer clarity around 2.5 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 not on record), 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.