Weekend programs: fossil hikes, river fishing, National Trails Day

Forestville/Mystery Cave State Park

10-11:30 a.m. Saturday

Set out in search of 450-million-year-old brachiopods. Meet at the amphitheater for a brief talk, followed by a car caravan to a location outside the park where you can keep the fossils you find. Collecting is not allowed in the park. (1-507-352-5111, mndnr.gov)

Interstate State Park

2:30-3:30 p.m. Saturday

Native plants are not only beautiful, they also give food and habitat to countless creatures. Discover how you can put them to work in your own backyard. Stop by the "investigation station" near the visitor center. (651-465-5711, mndnr.gov)

Fort Snelling State Park

Learn what fish need to survive and how to identify them, then fish on the Mississippi River. Fishing poles and bait will be provided. No fishing license is needed. Registration required. Call 612-725-2724 to register. (mndnr.gov)

Minnesota Valley National Wildlife Refuge

9 a.m.-1 p.m. Saturday

Gather on the slopes of the Minnesota River Valley to explore what the birds are telling us about our surroundings. We will split the time between a classroom at the Bloomington visitor center and outdoors. Bring note- taking tools. Register at mntracking.org.

Richardson Nature Center

Celebrate National Trails Day, celebrated annually on the second Saturday in June. There will be a two-mile, moderately-paced hike. Trek through prairie, forest and wetland habitats. Bring Nordic walking poles or borrow a pair (limited number available). Children 17 years and younger must be accompanied by an adult. (763-694-7676, threeriversparks.org)

Lowry Nature Center

12:30-2 p.m. Sunday

Explore behind-the-scenes care of captive birds of prey. Discuss equipment and meet a raptor. Cost is $5. Reservations recommended. (763-694-7650, threeriversparks.org)

Whitewater State Park

This is a program for inexperienced anglers, families and youth groups. Fishing equipment will be provided, but bring your own bait. Fishing licenses and trout stamps are not required. Intro to Trout Fishing will be offered again every Sunday through Sept. 3 at Whitewater. (1-507-932-3007, mndnr.gov)

Lake Maria State Park

11 a.m.-noon Sunday