Arusha Region
DifficultNgorongoro Crater Rim to Lake Natron — Rift Valley Volcanic Floor via Ol Doinyo Lengai and Engaruka Ruins
Active volcano, soda lake, forgotten city.
Surface: Dirt
Texas
ModerateTrans-America Trail — Uvalde to Rocksprings via the Nueces River Canyon and Edwards Plateau Divide (West Texas Classic Segment)
Limestone canyons and cattle country, no shortcuts.
Argentina
DifficultPaso Agua Negra — Vicuña to Rivadavia via the Dry Andes High Desert Crossing
4,765 metres of Andean silence between two countries.
USA
ModerateTrans-America Trail — Pinedale to Dubois via the Wind River Range High Desert and Union Pass
One ridge. Three oceans. No cell signal.
Australia
DifficultGibb River Road — Mornington Wilderness Camp to Mitchell Falls via Kalumburu Road Junction and King Edward River
Four tiers of falls, zero forgiveness.
Antofagasta Region
ExpertRooftop of the Andes — Paso Sico to Paso de Jama via the Puna de Atacama High Volcanic Circuit
Two passes, one brutal Andean loop.
Argentina
DifficultPaso Vergara to Futaleufú — Northern Patagonian Frontier via the Palena River Valley and Carretera Austral Backdoor
Mud, fords, and raw Patagonia before the crowds find it.
California
ModerateMojave Road — Piute Gorge to Fort Piute via Lanfair Valley and Keystone Spring (Eastern Approach Classic)
Civil War ruins and desert wash in the East Mojave.
Texas
ModerateTrans-America Trail — Uvalde to Rocksprings via the Nueces River Canyon and Texas Hill Country Divide
Hill Country caliche and canyon walls.
Canada
DifficultDempster Highway — Dawson City to Inuvik via the Richardson Mountains and Peel Plateau (Classic Full North Traverse)
740 km of Arctic gravel. Bring two spares.