Jennings Environmental Education Center, Route 528 near the intersection of Routes 8 and 173, Slippery Rock, will host snowshoeing for beginners on snowy Saturdays. Registration is required by calling the center at 724-794-6011.region

Powdermill Nature Reserve at 1847 Route 381 in Rector, Westmoreland County, the biological research station of the Carnegie Museum of Natural History, is the site of a winter nature hike at 1 p.m. Saturday as well as Jan. 30. Admission is free; no registration is required. "Wild Mustangs in the United States" will be presented by Carrie Derco, Powdermill geographic information systems specialist, on Sunday. Call 724-593-6105 or visit the Web site, www.powdermill.org.