Fossil field trip
Whitewater State Park
10 a.m.-noon Saturday
Find fossils of plants and animals. Transportation needed. The site is 9 miles from the park. (507-932-3007, www.mndnr.gov.)
Fish printing
St. Croix State Park
11 a.m.-5 p.m. Friday
Stop by the St. Croix Lodge for the activity. The park's fourth annual "Ectothermathon Weekend" continues on the weekend with more attention to coldblooded creatures. (320-384-6591, www.mndnr.gov.)
Geocaching
Interstate State Park
1-2:30 p.m. Saturday
Meet at the park office (use the park's campground entrance). (651-465-5711, www.mndnr.gov.)
Campfire contest
William O'Brien State Park
10:30 a.m.-3 p.m. Saturday
Learn recipes and get tips, and then take part in the "Chomped" competition. You will have two hours to build a fire and design a menu from the secret ingredients provided. (651-433-0500, www.mndnr.gov.)
Family log rolling
French Regional Park
1-2:30 p.m. Sunday