Mexico
Moderate
Real de Catorce Ghost Town Route
Through the tunnel to Mexico's ghost town in the sky
Feature: Scenic
Baja California
Difficult
Devil’s Backbone – Sierra de San Pedro Mártir
Knife-edge granite ridges to Mexico's highest peak
Mexico
Moderate
Monarch Butterfly Migration Route – Central Mexico
Chase millions of monarchs through mountain wilderness
Mexico
Expert
Sierra Madre Oriental Backbone Trail
High-altitude spine through Mexico's eastern peaks
Chihuahua
Difficult
Copper Canyon Rim Trail
Cliff-hanging route through Mexico's grandest canyons
Baja California
Moderate
Baja Peninsula Central Desert Route
Classic Baja desert crossing through mission country
Montana
Moderate
Beartooth Highway
Sky-high pavement through untamed peaks.
USA
Difficult
Rattlesnake Canyon Trail
Where flash floods carve trails and crowds fear to tread.
South Dakota
Expert
Cathedral Spires Trail
Black Hills granite maze for serious wheelers only.
USA
Moderate
Chinook Pass Scenic Byway
Winter's lockdown, summer's payoff.