There are few places in Yellowstone NP to ride a mountain bike. The Mount Washburn/Chittenden Rd. route is one. When I rode this road three times this past summer, I didn't see another biker but lots and lots of hikers. The road starts out at about 8,500 feet. Ride around the closed/locked gate and begin the 3-mile climb to 10,243 feet--over 1,700 feet of elevation gain. It is not particularly steep; however, when you take into account the altitude, it's a workout. Nothing technical about it. Some larger, loose rocks in places, but they are easy enough to avoid. After reaching the top, taking in the view and snapping a few pics, it's time for the fun part. There is a lookout tower at the top with a restroom and viewing room. Plenty of people up there to take your pic next to the Mount Washburn sign. The only thing I had to worry about was the amount of hikers on the road--nothing you can do about it. On one of my rides, I rose past a 2,000-pound bison right on the road and several bighorn sheep. With the workout, the scenery and the wildlife, this ride is more than worth it.