Big Stone Lake State Park
Big Stone Lake State Park is a state park in Big Stone County. It was established in 1961. 8 graded lakes are within 15 miles of the park, including Cup Lake, Olson Lake, Unnamed Lake.
Big Stone Lake State Park is a Minnesota State Park covering an unrecorded acreage acres. State parks are the most heavily-developed of the public-land designations — campground, picnic, boat-launch, interpretive-center. 8 graded lakes are within easy reach of the park, with an average grade of D. Cup Lake (D) is the cleanest of the set.
State parks pair well with the LakeGrade dataset: the park itself usually has interpretive signage explaining the local lake system, but the per-lake grade tells you which actual lake in the system to head to.
Official Resources
Nearby Graded Lakes (within 15 mi)
Lakes closest to Big Stone Lake State Park, weighted by size. Click a lake for its full water quality grade, fish species, and depth.
| Lake | County | Grade | Surface Area | Distance |
|---|---|---|---|---|
| Cup Lake | Big Stone | D | - | 8.1 mi |
| Olson Lake | Big Stone | F | - | 8.7 mi |
| Unnamed Lake | Big Stone | F | - | 8.8 mi |
| Otrey Lake | Big Stone | F | - | 9 mi |
| Unnamed Lake | Big Stone | D | - | 9.6 mi |
| Big Stone Lake | Big Stone | D | - | 9.9 mi |
| 06-0422-00 Lake | Big Stone | D | - | 12.2 mi |
| East Toqua Lake | Big Stone | F | - | 12.8 mi |
Other Parks in the Area
- Lac qui Parle State Park— State Park, 38.9 mi
- Glacial Lakes State Park— State Park, 49.2 mi
Source: EPA National Aquatic Resource Surveys, 2026.