Bluffland bats
Whitewater State Park
7-8 p.m. Friday
• Learn the importance of these little creatures now seriously threatened by white-nose syndrome, a lethal fungal disease. (1-507-312-2300; mndnr.gov/whitewater)
Fish in the river
Fort Ridgely State Park
4-5 p.m. Friday
Find out what's swimming in the Minnesota River. Children's activities included. (1-507-384-8890; mndnr.gov/fortridgely)
State park history
Buffalo River State Park
2-3 p.m. Saturday