Kildo Trail - McConnells Mill State Park - Portersville, Pennsylvania Stock Photography

McConnells Mill State Park, Portersville, Pennsylvania Kildoo Trail is a moderate 2 miles (3.2 km) hiking trail loop. It begins and ends at the McConnells Mill Covered Bridge and follows the banks of Slippery Rock Creek. The western portion of the trail is marked with blue blazes and is also part of the North Country Trail. The natural character of McConnells Mill State Park, the scenic gorge, waterfalls, rugged hiking trails and whitewater creek, are all directly caused by the geology of the area. The bedrock formed over 300 million years ago as layers of sand, mud and peat in what was a coastal area. After becoming rock, these different layers were lifted to the surface in several mountain-building events. The different strengths of these rocks cause them to erode differently, helping to make the varied landscape of the park. The gorge and the dramatic topography of the park were created by glaciers over the past two million years.