Big Stone Lake is 26 miles long and is located on the South Dakota-Minnesota border. The lake is the source of the Minnesota River and attracts anglers who catch walleye, northern pike, yellow perch and bluegills. The northern section of the park, called the Bonanza Area, provides a picnic area and boat launch for guests. The area also includes the Bonanza Education Center which provides a place to discover the past and ways to preserve it. The southern section of the park, called the Meadowbrook Area, contains a campground, swimming beach and hiking trails.