Going for gross
Wild River State Park, 2-3 p.m. Saturday
Some things in nature have always been thought of as a little gross, but some of them are also interesting. Learn why leeches and maggots are used in hospitals, for example, and discover the difference between snails and slugs. Meet at the visitor center. (651-583-2125, ext. 227, mndnr.gov)
Candlelight walk
Brown's Creek State Trail, 6-9 p.m. Saturday
The west portion of the trail from Lofton Avenue to Duluth Junction will be lit with candle luminaria. Parking available at the Gasthaus Bavarian Hunter on Lofton Avenue. (651-231-6968, mndnr.gov)
A walk with history
Fort Snelling State Park, 1-2 p.m. Sunday
Giant cottonwoods and tall silver maple trees dominate the park trails. Join a park naturalist for a walk as we investigate their history. (612-725-2724, mndnr.gov)
Bird-watching
Minnesota Valley National Wildlife Refuge, 8-10:30 a.m. Saturday
A bird walk starts at the Bass Ponds trailhead in Bloomington. During the fall migration period, the refuge witnesses a mix of waterfowl, raptors, warblers and sparrows. Birders of all levels are welcome. Bring binoculars if you have them. Dress for the weather. (bit.ly/mnfwr)