Bring your bike, helmet, light and sense of adventure for Saturday night's Moonlight Bike Ride. The group will meet 8:30 p.m. in the Glatfelter Station Parking Area on the York County Rail Trail. Each 9-mile ride focuses on a local history or environment article. Tonight's topic is bats. Learn about the winged mammals in time for next month's Batman installment "The Dark Knight Rises." Cost is $5 for adults. Kids younger than 12 ride for free. Light refreshments will be served after the ride. For details, call 717-840-7440 or visit yorkcountypa.gov/parks-recreation.html.