Book 12K Oso Negro® TrailRun

Ultra Trail Oso Negro 12K: Your Gateway to the Mountain

Ready to conquer the peak? The new 12K distance at Ultra Trail Oso Negro is engineered for both trail newcomers looking for their first mountain challenge and fast-paced runners seeking an explosive, high-speed technical course.

Experience the breathtaking mountain landscapes on a fast, accessible route backed by the world-class logistics, safety, and atmosphere of one of Mexico’s most iconic trail events.

Why Choose the 12K?

1. For Beginners: The ultimate stepping stone to transition from road to trail without the toll of an ultra-distance.
2. For Speedsters: A dynamic, fast course to push your pace, test your speed, and dominate quick climbs and technical descents.
3. The Full Oso Negro Experience: Cross the iconic finish line, earn your official finisher medal, and immerse yourself in an unmatched trail community.

Your Registration Includes:

1. Official race bib and electronic timing chip.
2. High-performance commemorative race shirt.
3. Official Finisher Medal (upon crossing the finish line).
4. On-course hydration and nutrition stations.
5. Course safety.

🔥 Limited spots available. Secure your entry today and join the inaugural class of Oso Negro 12K finishers.