Currently, ~40 million people rely on the water in the Colorado River, but changing precipitation patterns and increasing population and water demands are going to provide challenges to river management. The US Bureau of Reclamation recently published a study to assess supply and demand under various climate and demand scenarios. American Rivers listed the Colorado River as the most endangered river in the United States. Each student will find a topic within their area of expertise that has to do with the changing Colorado River. The course will be followed by an optional, private Grand Canyon rafting trip over spring break open to all participants. Trip participants will be expected to help organize logistics for the field trip, including food, gear, transportation and field itineraries. Enrollment is by instructor consent only and is based on participation in previous year's Colorado River permit application process.