On the morning of June 18, 1990, high up in the Canadian Rockies. Robin Cody pushed his Sixteen-foot, forty-seven-pound Kevlar canoe through tall grass and mud to launch it on peaceful Columbia Lake, the nominal source of the river that heaves more water into the Pacific Ocean than any other in North or South America: the Columbia. For the next eighty-two days, Cody would steer his canoe around massive dams, through killer rapids, and across reservoirs...