John Wesley Powell

John Wesley Powell (March 24, 1834 – September 23, 1902) was a U.S. soldier, geologist, explorer of the American West, professor at Illinois State University, and director of major scientific and cultural institutions. He is famous for the 1869 Powell Geographic Expedition, a three-month river trip down the Green and Colorado rivers that included the first known passage through the Grand Canyon.

• http://en.wikipedia.org/wiki/John Wesley Powell
• http://www.utah.com/hike/parunuweap-canyon-trail