Maah Daah Hey and Petrified Forest Loop

The route typically starts from an access road that can be unpaved and rough, so a high-clearance vehicle is recommended to reach the trailhead. Parking is available at the trailhead.

The terrain is quite varied. You'll encounter sections of packed dirt, classic badlands geology, and open prairie. The route includes steep climbs and descents, notably a significant 300-foot descent followed immediately by a 300-foot climb in the North Petrified Forest Trail portion. Some parts of the Maah Daah Hey segment on this loop are flat, open grassland, while the South Petrified Forest Trail is mostly flat except where the petrified wood is located. Be aware that bentonite clay soil, common on the Maah Daah Hey, can be slick when wet.

Spring and fall generally offer the most pleasant conditions for mountain biking. Summers can bring high heat, and winters can have significant snow. The trail is fully exposed to sun and wind, so be prepared for dynamic weather regardless of the season.

While the Maah Daah Hey Trail connects units of Theodore Roosevelt National Park, mountain biking is generally not permitted within the park units themselves; alternate bike trails have been constructed to bypass these sections. Therefore, you typically won't need a park entrance fee for the specific mountain biking sections of this route, but always check the latest regulations from the National Park Service (nps.gov) before your visit.

This route is generally rated as moderate, requiring good fitness. While some sections are flat, others involve steep ascents and descents, and some portions may necessitate advanced riding skills or even pushing your bike. It's not typically recommended for absolute beginners.

The primary highlight is the impressive collection of petrified wood, which is among the highest concentrations in the United States. You'll also experience the unique badlands geology, wide-open prairies, and views of the Little Missouri River and surrounding valley. Specific trail sections include the Petrified Forest Trail (South) and Big Plateau Trail.

Wildlife sightings are common in this area. You might spot bison, prairie dogs, mule deer, coyotes, and eagles along the route, especially in the more open prairie and badlands sections.

Yes, this route incorporates significant sections of the Maah Daah Hey Trail. It also passes through parts of the Petrified Forest Loop Trail and the Big Plateau Trail.

Generally, dogs are not permitted on backcountry trails within Theodore Roosevelt National Park, which includes many sections of the Maah Daah Hey Trail and the Petrified Forest Loop. Always check specific regulations with the National Park Service or local land management agencies before bringing your dog.

Given the exposure to sun and wind, and the rugged terrain, it's essential to bring plenty of water, sun protection (sunscreen, hat), and appropriate layers. A repair kit for your bike is also advisable, as some sections are remote. High-clearance vehicles are recommended for accessing the trailhead.

The estimated duration for this 23.8 km (14.8 mi) route is around 2 hours and 11 minutes. However, this can vary significantly based on your fitness level, the specific conditions of the trail, and how often you stop to enjoy the scenery or navigate challenging sections.