Sean O'Brien Trail Runs
Always double-check with the organizer's website! This page may contain affiliate links.
Sean O’Brien Trail Runs
Sean O’Brien Trail Runs takes place on January 30, 2027 at Malibu Creek State Park in Calabasas, California. The event is held in the Santa Monica Mountains and features multiple trail race distances over singletrack and fire road terrain. Courses are clearly marked and runners are required to carry their own hydration. The event serves as a qualifier for WSER and Angeles Crest.
The courses include substantial total elevation gain across distances, with high points along the Santa Monica Mountain ridgelines. Organizers provide course maps and athlete guides for each distance.
Distances
- 30K: 19.4 miles, 3,894 ft gain, high point 2,217 ft
- 50K: 32.1 miles, 6,719 ft gain, high point 2,273 ft
- Marathon: 27.2 miles, 5,692 ft gain, high point 2,257 ft
- 50 Mile: 49 miles, 11,492 ft gain, high point 2,404 ft
- 100K: 61.7 miles, 13,179 ft gain, high point 2,408 ft
Additional event materials include athlete guides for the 30K, Marathon, 50K, 50 Mile, and 100K races, and archives of past results and race-day photos. Visit the organization's website for the most recent information.
