The Warm Springs Rapid history project (1996-2010) consists of materials related to the preparation of a special research trip for June 2-6, 2008 for the purpose of bringing together as many of the people who were there at Warm Springs in June of 1965 as possible. Warm Springs Rapid, on the Yampa River in Dinosaur National Monument, is one of the most difficult stretches of runnable whitewater in the United States.