The Maah Daah Hey Trail is a 232km (144 mile) single-track trail (for non-motorized bikes) through the Badlands of North Dakota.
Popular as a cycling route but also prime for backpacking, the Maah Daah Hey Trail is a 144-mile point-to-point route across the badlands and prairies of western North Dakota. It passes through Theodore Roosevelt National Park and features stark landscapes, abundant wildlife, and unique geological formations.
There are 14 trailheads that provide direct access to the trail which is open year-round but it is best to check the weather before using the trail.
Bikepacking.com has some good information about the ride.
North Dakota Travel & Tourism Guide
Maah Daah Hey Trail Association
Route type: Long Distance Point 2 Point