Arbor Day hike
Blue Mounds State Park
4-5 p.m. Friday
• Meet at the visitor center and learn about types of trees, leaf shape, bark and more. The walk will include hilly terrain. (1-507-283-6050; mndnr.gov/bluemounds)
Spring hike
Itasca State Park
1-2:30 p.m. Friday
• Naturalist-led walk. (1-218-699-7251; mndnr.gov/itasca)
Phenology walk
Jay Cooke State Park
10:30 a.m.-noon Saturday