Australia
DifficultGibb River Road — Beverley Springs to Mitchell Plateau via King Edward River and Kalumburu Road Junction
Mitchell Falls or bust — no rescue coming.
Surface: Rock
Australia
DifficultGibb River Road — Silent Grove to Adcock Gorge via King Leopold Ranges and Lennard River
Limestone gorges and corrugations in the Kimberley.
California
ModerateMojave Road Central — Afton Canyon to Piute Spring via Mid Hills and Hole-in-the-Wall
Mojave's volcanic heart — canyon to cliff face.
USA
ModerateGunsight Pass Road — Wind River Range Wilderness Backdoor via Big Sandy Desert and Lander Cutoff
Oregon Trail grit meets Wind River granite.
Australia
DifficultGibb River Road — Adcock Gorge to Bell Gorge via Barnett River and Beverley Springs Station
Kimberley gorges, corrugations, and one big river.
South Dakota
ModerateRowdy Ridge to Thunder Basin — Black Hills Backcountry High Divide
Shale ridges, ponderosa, and fifty miles of nothing.
Argentina
ExpertRooftop of the Andes — Paso Agua Negra High Desert Crossing
4,765m of volcanic scree and zero forgiveness.
Colorado
DifficultSlumgullion Pass to Lake City — Hinsdale County Alpine Loop Connector via Spring Creek
San Juan high country above 11,000 feet.
Gandaki Province
DifficultMuktinath to Jomsom High Desert Road
Deepest gorge on Earth, on dirt.
Northern Cape
ExpertRichtersveld Ganakouriep Desert Canyon Trail
Africa's most remote canyon drive.