From one of Outside magazine’s “Literary All-Stars” comes the thrilling true tale of the fastest boat ride ever through the Grand Canyon, atop the legendary Colorado River flood of 1983. In the spring of 1983, massive flooding confronted engineers at Glen Canyon Dam with an unprecedented emergency. Amid the crisis, Kenton Grua launched a small wooden dory, the Emerald Mile, intending to use the flood as a hydraulic slingshot to set the all-time record for the fastest boat through the Grand Canyon. Fedarko re-creates the epic, near-suicidal voyage and the surrounding history, engineering, and characters that made it possible.