1 Lake Maria Volksmarch
Lake Maria State Park, Oct. 25, 9:30 a.m.-3 p.m.
Meet at the park's trail center for a 10-kilometer group hike organized by NorthStar Trail Travelers. Each participant selects a group of hikers to match his or her pace. More information: 763-878-2325 or www.nstt.org.
2 Fall birding for beginners
Fort Snelling State Park, Oct. 25, 10-11:30 a.m.
Meet at the visitor center for a naturalist-led hike and introductory lesson on bird identification. Binoculars and bird guides will be available. Registration required; 612-725-2724. More information: www.mndnr.gov/ptcalendar.
3 Family fall color adventure
Coon Rapids Dam Regional Park, Oct. 25, 1-4 p.m.