Sean O'Brien 100K

JAN

30

2027

Multiple race distances from 30K to 100K are scheduled for January 30, 2027 near Las Virgenes Road in Calabasas, California. The 100K is a 2026 WS100 qualifier and registration opens July 1, 2026.

Sat 30 Jan 2027

Calabasas, California

Website

100 kilometers 50 miles 50 kilometers 26 miles 30 kilometers

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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.

100 km

100k

50 mi

50 Miler

50 km

50k

26 mi

Marathon

30 km

30k