Patrick Tierney has been a professional rafting guide and outdoor educator on the Yampa River for 39 years. It started in 1976 when he was a kayak-based ranger for the National Park Service on the Green and Yampa Rivers in Dinosaur National Monument (DNM). His master’s thesis was on boater impacts to the river corridors of the Green and Yampa Rivers in DNM. Pat and his wife Robin owned and operated Adrift Adventures for 25 years and ran commercial 1-5 day rafting and kayaking trips on the Yampa and six other rivers. Their company was nominated for a Conde Nast Traveler International Ecotourism Award. Currently he is a professor of recreation, parks and tourism at San Francisco State University. Pat is a co-author of four books and over 30 articles, including one titled Wild and Scenic Rivers; Safeguarding Those That Remain. Pat was actively involved in the successful effort, and testified before the U.S. Senate, to designate Colorado's Cache la Poudre River as a National Wild and Scenic River.