The Audubon Society hosts naturalist led walks at 9 a.m. Thursdays at the Succop Conservancy, 185 Airport Road, Penn Township. Call 412-963-6100 or visit www.aswp.org to register.

Jennings Environmental Education Center, Route 528, Brady Township, has no openings left for the program “Eating Green, Eating Wild!” May 11. A spring wildflower walk will begin at 2 p.m. May 12. Registration for DiscoverE summer programs begins Monday. Call 724-794-6011.

McConnells Mill State Park in Slippery Rock Township, Lawrence County, opens the gristmill May 18. Admission is free. Call 724-368-8811.