Australia
ModerateGibb River Road — Tunnel Creek to Windjana Gorge via Napier Range Limestone Corridor
Devonian reef, cave outlaws, croc-lined gorges.
Trail Type: High Clearance
South Dakota
ModerateMojave Road — Afton Canyon to Needles via Government Holes and Lanfair Valley (Night Sky Variant)
Grassland benches and a volcanic plug at trail's end.
Ethiopia
ExpertTransafrica — Cairo to Cape Town via the East African Corridor
UNESCO escarpment edge. Geladas and 1,500m drops.
Bhutan
DifficultBhutan Lateral Road — Thimphu to Trashigang via Thrumshingla Pass
Bhutan's backbone: cloud forest, passes, no tourists.
Australia
DifficultGibb River Road — Imintji to Silent Grove via the Kimberley Ranges Heart
Red dirt, big gorges, zero mercy.
Australia
ModerateGibb River Road — Home Valley to Wyndham via Cambridge Gulf and Keep River Rim
Croc country at the Kimberley's eastern edge.
China
DifficultSichuan–Tibet Highway — Batang to Markam via the Jinsha River Canyon and Tibetan Plateau Edge
Drop to the Yangtze, climb into Tibet.
Nevada
ModerateLonesome Highway — Black Rock Desert Playa to Soldier Meadows via High Rock Canyon Rim
Playa to canyon. Flat to vertical. Nevada at its loneliest.
Botswana
ModerateNossob River Valley Track — Mata-Mata to Nossob Camp via the Kgalagadi Fossil Riverbed
Lions on a fossil river. No signal. No excuses.
Ethiopia
ExpertNairobi to Moyale — Northern Kenya Desert Highway via Marsabit and the Chalbi Desert
Kenya's hardest highway — not even close.