Daryl L. Hunter's Photo Gallery of Teton Valley Idaho. Idaho’s Teton Valley lies, snug against the 13,000’ peaks of the Grand Teton range, Along the eastern border of Idaho, a border it shares with Wyoming. Teton Valley shares the Grand Tetons with our neighboring valley to the east, the more famous, Jackson Hole, Wyoming, Folks describe Teton Valley as "The quiet side of the Tetons." The jagged, snow-capped Tetons to the east and the rolling Big Hole Mountains to the west cradle the gentle, flat course of the Teton River. Teton Valley fly-fishing has become a tradition of providing quality dry fly fishing for tens of thousands of fishermen in Idaho and is destination-fishing resort for people the world over.