The Upper Yough flows through one of the last remaining wilderness canyons in the eastern U.S., according to Precision Rafting. It is known for its remarkable average vertical drop of over 115 feet per mile for 5 miles. The scenery surrounding the Class III to V rapids in Upper Yough River is wild and gorgeous. A typical trip will take about 3 to 5 hours, rafting about 10 miles. You can see Upper Youghiogheny White Water River Rafting in this video.