Sean O'Brien 100K
Calabasas, United States • 30 Jan 2027
Sean O'Brien 100K/50M/50K/26.2/30K : January 30, 2027
This event takes place in Calabasas, California, at 1925 Las Virgenes Road. It offers a set of organized race distances along local routes on January 30, 2027. Distances being offered include:
- 100K
- 50 Miler
- 50K
- Marathon (26.2)
- 30K
The 100K is listed as a 2026 WS100 qualifier. Registration for the event opens on Wednesday, July 1, 2026 at 6:00 AM PT. The event is presented as part of the Sean O'Brien series and includes mapped locations near Las Virgenes Road in Calabasas.
Information provided lists multiple viewing points along the course. The description focuses on the available race distances, the qualifier status for the 100K, the date, and the location in Calabasas. No start or finish times are included here. Visit the organization's website for the most recent information.