Bureau of Land Management, Idaho.
Welcome to the Grand Canyon of Southwest Idaho! This canyon was shaped by an astounding combination of volcanism, glacial melt and regional drainage patterns. The Bruneau Overlook is the only readily accessible spot to view this spectacular canyon carved through basalt and rhyolite by the Bruneau River. The opposite rim is 1,300 feet away and the distance from rim to riverbed is 800 feet. From this spot near the northern end of the 60-mile canyon, view the wild and scenic Bruneau River tumbling out of the Bruneau-Jarbidge Rivers Wilderness.
Take Hwy-51 south to the town of Bruneau, turning left/east on Hot Springs Road (unmarked) at the One Stop Cafй. Reset trip odometer here. 00.0 mi: Hot Springs Road at Hwy-51 15.6 mi: Turn right/southwest at “Canyon Overlook” sign 18.7 mi: Overlook parking lot