Join the Park Naturalist to learn about the Onion Fields, Bridge 20, The Pittsburgh and Lake Erie Railroad and other interesting Spillway facts on this short hike along the Spillway Trail. This is also a great time of year to see migrating birds. Total length of hike will be from the Spillway Parking Lot to Fries Road and back approximately a mile. Registration is required. To register contact Jared McGary at jamcgary@pa.gov. Meeting at the Spillway Main Parking Lot.