100 kilometers through the wild peaks of Sierra de Arteaga
One of northern Mexico's most respected 100-kilometer mountain challenges, tracing high ridgelines and forest trails through the Sierra de Arteaga. With 5,340 meters of climbing and a 22-hour cutoff, the 100K demands solid ultramarathon experience and high-altitude preparation. Runners share the start with the 163K field at 4:00 AM, experiencing the Sierra's mountain terrain in darkness before sunrise reveals the stunning Coahuila landscape.
Experienced ultrarunners
Arteaga, Coahuila, MexicoJuly 25, 2026


| Location | km | Elevation |
|---|---|---|
Start Start | 0.0 | 2,766 m |
km 37 Aid Station Aid Station | 37.0 | 2,332 m |
km 62 Aid Station Aid Station | 62.0 | 2,789 m |
km 90 Aid Station Aid Station | 90.0 | 2,872 m |
Finish Finish | 100.0 | 2,762 m |
Sign in to see cutoffs, crew access, drop bags, and services for every aid station.
Bosques de Monterreal resort offers cabin-style hotel rooms and full cabins at the race venue. All expo activities and race bib pickup occur on-site. Book early — prices increase closer to the event. Contact: 844 438-8170 / 818 333-8430.
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