Sean O'Brien 100K Trail Run

Date: January 31, 2026

Location: Malibu, California, United States

Distances: 30K, Marathon, 50K, 50M, 100K

Description: The Sean O'Brien Trail Runs explore the stunning Santa Monica Mountains, with courses featuring ocean views, technical singletrack, and significant climbs. Named after a local running legend, it offers multiple distances from marathon to 100K, making it accessible yet challenging. This event is renowned for its community atmosphere and picturesque Southern California scenery.

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