I haven't ridden through Hell's Canyon, but did ride from McCall to Cambridge and then up to Oxbow on ID-71, and then south and west to Pine and Baker, OR, and then back NE to Medical Springs before going back NW to Elgin and then Tollgate before getting to WallaWalla on the '14 Three-Flags Classic. It was a great day of riding. Eldon Cannon (EX-WINGER on the Forum) has family ties to the area just west of Hell's Canyon. He and I were talking today about Rattlesnake Grade (WA-129 and OR-3). He says that's an incredible ride.