Olaf Lake
Otter Tail County, Minnesota. DNR lake ID 56095000.
Olaf Lake is a 378-acre lake in Otter Tail County, Minnesota. Its deepest point reaches 61 ft+ (deepest measured basin). Summer water clarity averages 7.1 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 Olaf 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 Olaf LakeWhat’s my Olaf Lake property worth?Call (218) 656-6469
Quick facts
| DNR lake ID | 56095000 |
|---|---|
| County | Otter Tail County |
| Surface area | 378 acres |
| Maximum depth | 61 ft+ (deepest measured basin) |
| Share under 15 ft | Not surveyed |
| Water clarity (summer) | 7.1 ft through 2019 |
| Phosphorus (summer) | 56.1 µg/L |
| Algae, chlorophyll-a (summer) | 6.3 µg/L |
| Nutrient class | Eutrophic |
| 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 2019: clarity 7.1 ft, phosphorus 56.1 µg/L, algae (chlorophyll-a) 6.3 µg/L. Using the Carlson trophic state index, Olaf Lake rates as eutrophic.
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
- West Olaf Lake 0.7 mi, Otter Tail County
- Grove Lake 2.4 mi, Otter Tail County
- Jacobs Lake 2.5 mi, Otter Tail County
- Colness Lake 3.3 mi, Otter Tail County
- Pete Lake 3.8 mi, Otter Tail County
- Prairie Lake 4.8 mi, Otter Tail County
- Harrison (Helgeson) Lake 4.9 mi, Otter Tail County
- Sand Lake 6.1 mi, Otter Tail County
Questions about Olaf Lake
How deep is Olaf Lake?
Olaf Lake reaches a maximum depth of 61 ft+ (deepest measured basin) according to Minnesota DNR records.
How big is Olaf Lake?
Olaf Lake covers about 378 acres in Otter Tail County, Minnesota.
How clear is Olaf Lake?
Summer water clarity on Olaf Lake averages 7.1 feet (Secchi depth) in MPCA monitoring through 2019. Its trophic state is eutrophic.
Does Olaf Lake have zebra mussels or other invasive species?
Olaf 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 Olaf Lake?
Homes on Olaf 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 Olaf Lake and nearby lakes, including off-market opportunities when available.
What is it like to live on Olaf Lake?
A mid-size lake with room for boating and fishing, and summer clarity around 7.1 feet. Conditions vary by property, so walk the frontage and ask us what similar homes have sold for.
Are there special fishing regulations on Olaf Lake?
No lake-specific regulation was found for Olaf Lake in Minnesota Rules or the DNR sunfish list. Statewide and zone regulations apply.
Ask us about Olaf 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.