Croquet in the Park, an introduction to the game of croquet for the whole family — with extreme courses available for more advanced players, will be held from 1 to 5 p.m. Sept. 28 at the newly renamed Succop Nature Park, formerly the Succop Conservancy, 185 W. Airport Road, Penn Township. E-mail rhandel@aswp.org or visit www.aswp.org.

Cruises aboard Nautical Nature, a 37-passenger enclosed pontoon boat, include a 90-minute narrated tour of Lake Arthur, as sponsored by the Moraine Preservation Fund. Cruises begin at 1 and 3 p.m. Saturdays and Sundays. Tickets for adults are $11 online and $12 at the gate, for senior citizens, $9 and $10, and for children, $5 and $6. Children under age 2 are free, and all children under 12 must be supervised. Call 724-368-9185 or visit www.moraine preservationfund.org.

Moraine State Park will have a kayaking program at 9 a.m. Tuesday. Call 724-368-3612 to register.

McConnells Mill State Park in Slippery Rock Township, Lawrence County, off Route 422, has the historic gristmill open from 11 a.m. to 4 p.m. Thursdays, Fridays, Saturdays and Sundays through September and then Fridays, Saturdays and Sundays in October. “Hemlocks of Hells Hollow” will be presented at 1 p.m. Saturday. The 22nd annual McConnells Mill Heritage Festival is slated for 11 a.m. to 6 p.m. Sept. 27 and 28. Call 724-368-8811.