Pennsylvania
ModerateWissahickon Creek Upper Trail
Historic mill road with technical stone crossings
Surface: Rock
Pennsylvania
ModerateFrench Creek State Park Iron Furnace Heritage Circuit
Revolutionary War iron roads through state forest
Pennsylvania
ModerateBrandywine Creek Iron Furnace Heritage Trail
Colonial blast furnace access roads and ore cart tracks
Pennsylvania
ModerateValley Green to Chestnut Hill Railroad Grade
Abandoned railroad climbs Wissahickon Gorge
Pennsylvania
DifficultCobbs Creek Park Utility Access Circuit
Technical creek valley challenge in West Philly
Argentina
ExpertRuta Provincial 15 Paso de Agua Negra Mining Circuit
Abandoned copper mines at 4,780 meters elevation.
Argentina
ExpertRuta Provincial 76 Abra del Acay
Argentina's highest driveable pass at 4,895m
Argentina
DifficultQuebrada del Condorito Córdoba Sierras Circuit
Condor canyon through Córdoba's mining sierras
Argentina
ExtremeRuta Provincial 17 Laguna del Diamante
Diamond lake beneath Maipo's volcanic shadow
Argentina
ModerateQuebrada de Yacoraite Mineral Circuit
Rainbow geology through Jurassic sediment layers