Book Oso Negro Ultra Trail 50K
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Challenge & Legend in the Sierra Madre
The Ultra Trail Oso Negro 50K is a technical and demanding race designed for trail runners looking to conquer the rugged mountains of the Sierra Madre Oriental. This course blends steep elevation gains, technical singletracks, and iconic landscapes across the municipality of Santiago.
The Course
Your adventure begins in the heart of the Magical Town of Santiago, N.L., where you will immediately start a steady, challenging ascent up to Puerto Gringo, rewarding you with breathtaking mountain views.
From there, you’ll tackle a technical descent toward Los Chorros, navigating through the Cuartones route. The trail then takes you into the imposing Cañón de las Ánimas before connecting to the dense pine forests of El Manzano.
The final mountain segment leads down toward the iconic Cola de Caballo waterfall, where you will enter the Brecha del Agua for the closing stretch—a prime section to push your pace for a triumphant finish back at the Main Plaza of Santiago.