Mary Lake
Todd County, Minnesota, near Upsala. DNR lake ID 77001900.
Mary Lake is a 129.1-acre lake in Todd County, Minnesota, near Upsala. Its deepest point reaches 58 ft, and about 30% of the lake is shallower than 15 feet. Summer water clarity averages 5.7 feet in Minnesota Pollution Control Agency monitoring, which places it in the eutrophic nutrient class. The DNR lists it for Eurasian watermilfoil. DNR surveys document walleye, northern pike, largemouth bass, black crappie, bluegill, yellow perch.
Buying or selling on Mary 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 Mary LakeWhat’s my Mary Lake property worth?Call (218) 656-6469
Quick facts
| DNR lake ID | 77001900 |
|---|---|
| County | Todd County, near Upsala |
| Surface area | 129.1 acres |
| Maximum depth | 58 ft |
| Share under 15 ft | 30% |
| Water clarity (summer) | 5.7 ft through 2017 |
| Phosphorus (summer) | 36.2 µg/L |
| Algae, chlorophyll-a (summer) | 17.7 µg/L |
| Nutrient class | Eutrophic |
| Invasive species | Eurasian watermilfoil |
| Public water accesses | 1 |
Water quality
Summer averages from Minnesota Pollution Control Agency monitoring through 2017: clarity 5.7 ft, phosphorus 36.2 µg/L, algae (chlorophyll-a) 17.7 µg/L. Using the Carlson trophic state index, Mary Lake rates as eutrophic.
Fishing on Mary Lake
The most recent DNR standard fish survey was in 2017 (9 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 | 1.67 | 1.2 to 5.3 |
| Northern pike | gill | 14.17 | 2.3 to 9.2 |
| Yellow perch | gill | 3.83 | 3.7 to 28.4 |
| Black crappie | gill | 5.67 | 0.8 to 8.4 |
| Bluegill | gill | 7.33 | n/a |
| Largemouth bass | gill | 0.67 | 0.3 to 1.5 |
| Pumpkinseed | gill | 0.17 | n/a |
Walleye catch was within the typical range for similar lakes in that survey.
Largest fish measured in recent DNR samples: Northern pike 33.0 in (2021), Walleye 10.0 in (2021), Largemouth bass 16.0 in (2017).
Game and panfish documented since 2005: Walleye, Northern pike, Largemouth bass, Black crappie, Bluegill, Yellow perch, Pumpkinseed, Hybrid sunfish, Green sunfish, Bowfin, Common carp, White sucker, Yellow bullhead, Brown bullhead, Black bullhead.
Fishing regulations
- Sunfish daily limit 5. (DNR Quality Sunfish Initiative)
Regulations change. Confirm with the DNR before fishing.
Invasive species
On the Minnesota DNR infested waters list for: Eurasian watermilfoil (listed 2018).
Public boat access
- Mary Lake: 1 concrete slab launch ramp, 1 dock, 8 trailer spaces. 1.5 mi S of Grey Eagle on Cnty Rd 33, then 3 mi E on Cnty Rd 2, then 1.5 mi S on Cnty Rd 103, then 1 mi E on Twp Rd to N shore. Directions
DNR water access records (2023). Confirm current conditions with the DNR.
Nearby lakes
- Goose Lake 2.0 mi, Todd County
- Cedar Lake 3.3 mi, Morrison County
- Big Birch Lake 4.0 mi, Todd County
- Mound Lake 4.4 mi, Todd County
- Pine Lake 4.5 mi, Morrison County
- Bass Lake 4.7 mi, Todd County
- Long Lake 5.5 mi, Morrison County
- Twin Lake 5.6 mi, Todd County
Questions about Mary Lake
How deep is Mary Lake?
Mary Lake reaches a maximum depth of 58 ft according to Minnesota DNR records. About 30% of the lake is shallower than 15 feet.
How big is Mary Lake?
Mary Lake covers about 129.1 acres in Todd County, Minnesota.
How clear is Mary Lake?
Summer water clarity on Mary Lake averages 5.7 feet (Secchi depth) in MPCA monitoring through 2017. Its trophic state is eutrophic.
Does Mary Lake have zebra mussels or other invasive species?
The Minnesota DNR infested waters list includes Mary Lake for Eurasian watermilfoil.
What fish are in Mary Lake?
Minnesota DNR surveys document walleye, northern pike, largemouth bass, black crappie, bluegill, yellow perch, pumpkinseed, hybrid sunfish, green sunfish, bowfin in Mary Lake. The most recent standard survey was in 2017.
Where is the public boat access on Mary Lake?
Mary Lake has 1 public water access site on DNR record: Mary Lake.
How is the walleye population on Mary Lake?
In Minnesota DNR net surveys from 1994 to 2017, walleye numbers on Mary Lake ran mostly within 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 Mary Lake?
Homes on Mary 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 Mary Lake and nearby lakes, including off-market opportunities when available.
What is it like to live on Mary Lake?
Small, quiet water suited to paddling and fishing, about 30% shallow shoreline under 15 feet, and summer clarity around 5.7 feet. Conditions vary by property, so walk the frontage and ask us what similar homes have sold for.
Are there special fishing regulations on Mary Lake?
Yes. Sunfish daily limit 5.
Ask us about Mary Lake
Whether you’re buying, selling, or just curious, our team works Todd County lakes every day. Send us a note or call (218) 656-6469.
Sources: Minnesota DNR LakeFinder records, DNR fish surveys (latest 2017), 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.