Roads that are only suitable for off-road vehicles are often called jeep trails.
The most famous is the Rubicon Trail located near Lake Tahoe in California. The so-called “Jeep Trail Capital of the World,” however, is Ouray, Colorado (that is the Ouray town motto). Ouray serves as a hub to mountain passes such as Engineer Pass and Cinnamon Pass (together forming the Alpine Loop National Back Country Byway), Imogene Pass, and Black Bear Pass. Trails in the Moab, Utah area include Hell’s Revenge, Pritchett Canyon, Metal Masher, Moab Rim, Cliff Hanger and Poison Spider Mesa.