Jennings Environmental Education Center, Route 528, Brady Township, will host a kayaking outing on Slippery Rock Creek from 1 to 4:30 p.m. Sunday. Registration and payment of $15 are due today. Call 724-794-6011.

Moraine State Park will be the site of National Get Outdoors Day 11 a.m. to 4 p.m. Saturday at Lakeview Beach on the North Shore. Events will include kayaking, biking, fishing, disc golf, orienteering, youth archery, a climbing wall and paddleboarding. Admission is free. Call 724-368-8811.

McConnells Mill State Park in Slippery Rock Township, Lawrence County, has the historic gristmill open from 11 a.m. to 4 p.m. Fridays, Saturdays and Sundays through October. Interpretive tours, which last about 45 minutes, will be available at 1 and 3 p.m. Admission is free.Star parties will start, weather permitting, at 8:55 p.m. June 14 and 15 at the Nicholas E. Wagman Observatory in Deer Lakes Regional Park near Russellton. Admission is free. Call 724-224-2510.