A two-hour float down one of the most popular stretches of the Spokane River begins where boaters lug kayaks and canoes down a humble strip of gravel beside the Barker Road Bridge. "When you get on the river, everybody is in the same medium," said canoeist Robbi Castleberry, who has floated the Spokane with her husband, Vic, for some 30 years. "They're just all boaters at that point."