Ultra Trail Oso Negro
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About the race
Ultra Trail Oso Negro is a series of trail running events organized by Matacanes Trails that take place in forested mountain terrain and river valleys. The event program includes multiple distances and race formats across the Sierra, with published elevation gains and international trail running association (ITRA) ratings for some distances.
Races listed include:
- Ultra Trail Oso Negro 100K
- Ultra Trail Oso Negro 50K : 3200 m+ elevation gain, ITRA 3
- TrailRun Oso Negro 30K : 2000 m+ elevation gain, ITRA 2
- Astro Trail Nocturno 21K
- Ultra Trail Montemorelos 50K, 26K, 12K
- Peyote Trail 26K
The program also includes a pre-registration option for the 100K event and volunteer opportunities for route support and event logistics. Entry fees are shown for individual races in Mexican pesos for specific editions. The listed venues emphasize routes through forests and rivers within the Sierra near Santiago, with photography and event media referenced. Event material is presented by Matacanes Trails and the Ultra Trail Oso Negro organization. Visit the organization's website for the most recent information.
