Length to Washburn Lockout Tower from: Dunraven Pass picnic area 3.0 miles, one way. Chittenden parking area 2.25 miles, one way. Elevation change: Dunraven Pass at 8,850 feet (1,393-foot gain, but a 1,491-foot gain from Chittenden parking area.) Trailheads: The first of two trailheads is at Dunraven Pass, 4.75 miles north of Canyon Junction on the Canyon-Tower Road. The second trailhead is at Chittenden parking area, via the turn-off 9.5 miles north of Canyon Junction, and including an additional 1.2-mile spur road. If you can accomplish only one hike in Yellowstone, this is the hike. No other single trail provides as much in the way of scenery, wildflowers and wildlife as the Mount Washburn Trail. This also is one of the best evening or sunset hikes, but the drawback is that the return is in the dark.