Ultra Trail Oso Negro

JAN

23

2027

Experience a demanding trail run through the forests and rivers of Sierra de Santiago with distances ranging from 30 km to a 100 km Western States qualifier.

Sat 23 Jan 2027

Santiago, Nuevo León

Website

100 kilometers 50 kilometers 30 kilometers

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Ultra Trail Oso Negro

The Ultra Trail Oso Negro is a trail running event held in the Sierra de Santiago, Nuevo Leon. The course takes participants through natural landscapes including mountain forests and river areas. The event features multiple distance options to accommodate different technical requirements and physical demands.

Participants can choose from the following distances:

100 km: A route featuring 5300m of positive elevation gain. This distance is a Western States qualifier and carries an ITRA 4 rating.
50 km: A mountain race with 3200m of positive elevation gain and an ITRA 3 rating.
30 km: A trail run with 2000m of positive elevation gain and an ITRA 2 rating.

The 100 km course is designed to be a demandng route through the varied scenery of the Sierra. Each distance focuses on providing a mountain experience within the regional ecosystem. The event is organized by Matacanes Trails and provides online registration and payment options for interested runners. Visit the organization's website for the most recent information.

100 km

Oso Negro 100k

50 km

Ultra Trail Oso Negro 50k

30 km

Trailrun Oso Negro 30k