Petrified Trail Loop

The trailhead for this hike cannot be reached from the main road through Theodore Roosevelt National Park. To get there from Medora, go west on I-94 then take exit 23. Go north along Forest Service Road 730 and follow the signs for the Petrified Forest. You'll pass a private road sign, but you have permission to continue. Continue on this road until you reach Road 730-2. Turn right then take the first left. A high-clearance vehicle is recommended as the road can have large ruts and potholes.There's about a 175-foot ascent in the first half mile of the trail which is the second largest climb along the route. The North Petrified Forest Trail portion is the most strenuous portion of the loop and contains the most elevation change. There's a 300-foot descent then immediately a 300-foot ascent just before meeting the Maah Daah Hey trail. The Maah Daah Hey portion is almost entirely flat open grassland. The South Petrified Forest Trail is also mostly flat open grassland except for the area where the petrified wood is located.

The petrified wood collection is one of the largest in the country. The north trail has the larger concentration of petrified wood.