This is a dirt and gravel road that begins just behind the Mammoth Hot Springs hotel and ends at the park’s north entrance. This is a one way auto road but bicycles are allowed to travel in both directions. Use caution and look for automobiles and and be aware of steep sections with winding curves. Mountain bikes are recommended. The distance is 5 mi. (8 km) one way. Traveling north is mostly all a steep downhill and riding south mostly all steep uphill. The elevation gain riding south is 1,079’ (328 M).
Alerts: Be alert for black bears, grizzly bears, elk, bison, and autos on the roadway. Consider riding with bear spray, have it accessible, and know how to use it. Federal regulations require you to stay at least 100 yards (91 m) away from bears and wolves, and at least 25 yards (23 m) away from bison and all other wild animals.
The terrain on this trail is quite steep—it gains/loses about 300 feet per mile (about 56m/km). The surface is an old road with a good gravel and dirt tread. The lower half of the trail, from the Montana state line to the North Entrance kiosk, is the steepest part of the trail. Stay alert as this trail is open to cars. Qualified service dogs are permitted in the backcountry, but travel with dogs in the backcountry is not without risks. Please be aware that having a service animal in the backcountry may put you at increased risk for confrontations with wolves, bears, and other wildlife.
Last updated: September 19, 2018