Big Stone Lake State Park

In the area

From Explore MN Tourism

Park Info

Image of Big Stone Lake State Park

Quick stats

1,131 acres
55,830 annual visits
4,177 overnight visits


The best way to learn more about Big Stone Lake State Park is to stop at the park office for a map and information about the park. Although the park does not have a naturalist on staff, activities are offered occasionally.


Deer, raccoons, thirteen-lined ground squirrels, meadowlarks, sedge wrens, pheasants, bobolinks, wild turkeys, thrashers, and mourning doves are sighted in the park.


In 1923, State Auditor Ray Chase critiqued the state park system and thought there was a geographic imbalance in the system. In his proposal for additional parks, Chase urged that more state parks be established in southern Minnesota. The Ortonville area was targeted as a place with a need for a state park. It wasn't until 1961 that Big Stone Lake State Park was established at the urging of Ortonville business people who were concerned about lakeshore development. Working with U.W. (Judge) Hella, director of Parks and Recreation Division, legislation was drafted to establish Big Stone Lake as a state park.


Long ago, this area was the south end of glacial Lake Agassiz. Torrents of water cut the valley when glacial river Warren drained Lake Agassiz. The area around Big Stone Lake State Park consists of granite and gneiss quarries. The top three inches of stone is exposed and contains the fossil remains of sharks' teeth.


Big Stone Lake State Park is part of the Minnesota River Country Landscape Region, a large area which extends almost 200 miles from Ortonville to Mankato. At one time, the landscape consisted of tall and mid-grass prairie, interspersed with marshes, lakes and streams. Today, extensive farming has replaced the prairie. Cottonwoods, ash, and silver maples can be found on the lake's shoreline. The Bonanza Scientific and Natural Area located within the park protects more than 80 acres of native oak savanna and glacial till prairie habitat. Bonanza also includes 50 acres of oak basswood forest and spring-fed ephemeral streams.