About This Race
The 135K at Chihuahua by UTMB takes runners deep into Mexico's Sierra Madre Occidental, traversing multiple canyon systems across 84 miles of demanding terrain. This distance requires managing effort through extended night running and high-altitude transitions, with the race starting and finishing in Chihuahua City. The cutoff structure demands consistent pacing rather than exceptional speed, making solid ultra experience and mental preparation as important as physical fitness. The mixed terrain includes singletrack trails, forest roads, and technical canyon descents that test different skill sets throughout the course. Runners face the dual challenge of altitude variability and temperature swings, particularly as the route drops into and climbs out of canyon systems. Heat management becomes critical during daylight hours, while nighttime sections present navigation and pacing decisions that can make or break a finish. This is the flagship distance at Chihuahua by UTMB, offering the most complete immersion in the Copper Canyon region's legendary landscape. The race attracts runners ready to test themselves against a course that demands respect for both the environment and the distance.
The 135K course explores the diverse terrain of the Sierra Madre Occidental, moving through pine forests, canyon systems, and high-altitude ridges. The mixed terrain alternates between runnable sections and technical passages requiring careful foot placement. Aid stations are spaced to account for the remote nature of certain course segments, with runners needing to carry mandatory gear and manage supplies strategically between stops.
Elevation Profile
Elevation profile estimated from terrain data. Actual course may differ.
The course gains 1,157m over 135km, with the steepest section between km 98–km 98.
Location
Practical Info
Variable conditions with warm to hot daytime temperatures and cooler nights; potential for afternoon storms during the racing season; low humidity but intense sun exposure at altitude.
Chihuahua City offers a range of lodging options near the race start and finish. Booking well in advance is recommended during race week, as the UTMB event draws international participants and their support crews.