The Whitewater River run from Howe Bridge (TR 342), Clarion County to confluence with Piney Reservoir in Pennsylvania is a popular destination among kayakers and rafters. The ideal streamflow range for this run is between 2.5 and 4.5 feet, measured at the New Bethlehem gauge. This translates to a flow range of approximately 200-1000 cfs. The river is rated as Class II-III, offering exciting rapids and obstacles for intermediate to advanced paddlers.

The segment mileage for this run is approximately 8.5 miles, with an average gradient of 20 feet per mile. The river features several notable rapids, including Double Drop, Rattlesnake, Bowtie, and Bull Rapids. These rapids offer challenges such as narrow channels, steep drops, and technical maneuvers.

There are certain regulations that paddlers must follow when visiting this area. Camping is not allowed along the riverbank, and fires must be contained to designated fire rings. All paddlers must wear a properly fitting personal flotation device, and alcohol is not permitted on the river. Additionally, paddlers must obtain a permit from the Pennsylvania Fish and Boat Commission to use the river.

Overall, the Whitewater River run from Howe Bridge (TR 342) to Piney Reservoir is a thrilling adventure for intermediate to advanced paddlers. With the ideal streamflow range, exciting rapids, and necessary regulations, this run is a must-visit destination for anyone interested in whitewater paddling in Pennsylvania.