COUNTY

Nautical Nature pontoon boat at Moraine State Park operates cruises on Lake Arthur at 1 and 3 p.m. Saturdays and Sundays from McDanel’s Launch on the North Shore. Call 724 368-9185. The cruises end with the Oct. 27 Halloween cruise. Reservations are recommended.

Moraine State Park will host Muddy Creek oil well demonstrations from 11 a.m. to 5 p.m. Saturday at the site on Park Road. The Industrial History of Muddy Creek and Slippery Rock Creek will be presented at 6:30 p.m. Wednesday at Pavilion 7 at the McDanel’s Launch area on the North Shore. Call 724-368-8811.

REGION

McConnells Mill State Park in Slippery Rock Township, Lawrence County, off Route 422, has a volunteer work day from 9 a.m. to noon Saturday. Call 724-368-8811 to RSVP. An owl prowl is planned for 7 p.m. Sept. 22 from the Kildoo Pavilion. The McConnells Mill Heritage Festival will be from 10 a.m. to 6 p.m. Sept. 29 and from 11 a.m. to 5 p.m. Sept. 30.

Star parties, sponsored by the Amateur Astronomers Association of Pittsburgh, will begin at about 7:30 p.m. Sept. 15, weather permitting, at the Nicholas E. Wagman Observatory in Deer Lakes Regional Park, near Russellton, Allegheny County. Call 724-224-2510.