Brazil
ModerateTranspantaneira Highway — Poconé to Porto Jofre via the Pantanal Wetland Corridor
147 wooden bridges to jaguar country.
Surface: Dirt
Arkansas
ModerateTrans-America Trail — Heber Springs to Harriet via the Ozark National Forest Buffalo River Highlands
The TAT's forgotten Arkansas highland crossing.
Idaho
ModerateNez Perce–Clearwater Forest Road Network — Red River to Elk City via the Gospel Hump Wilderness Divide
Old mining country, hot springs, and real Idaho wilderness.
Brazil
ExtremeTransamazônica Highway — Marabá to Humaitá via the Amazon Basin Interior (BR-230)
Brazil built it, then the jungle took it back.
California
ModerateMojave Road — Afton Canyon to Piute Spring via Soda Lake and Government Holes (West-to-East Historic Crossing)
The Army's old desert highway, still running.
Australia
ExpertCape York Telegraph Track — Bramwell Junction to Bamaga via the Old Telegraph Line (South to North Full Run)
Australia's hardest run to the top.
Romania
ModerateTransfăgărășan Highway — Curtea de Argeș to Bâlea Lac via the Southern Carpathian High Crossing
Ceaușescu's mountain madness, paved.
Alaska
ExpertTatshenshini–Alsek Wilderness Road — Haines to Dry Bay via Dalton Post and the Alsek River Corridor
Glacier valleys, grizzlies, and three borders.
California
ModerateMojave Road — Afton Canyon to Piute Spring via Soda Lake and Government Holes (East Segment)
Army camel corps, ghost forts, and playa that bites.
Bolivia
ExpertLagunas Route — Tupiza to Uyuni via the Bolivian Southwest Altiplano Circuit
Flamingos, volcanoes, and salt the size of Connecticut.