Sean O'Brien 100K/50M/50K/26.2/30K
Calabasas, CA
Sean O'Brien 100K/50M/50K/26.2/30K is a trail race of 50 miles (80 km) in Calabasas, California. The next edition is on Saturday, January 30, 2027.
There are 42 other upcoming 50-mile and 100K races in California.
Questions about Sean O'Brien 100K/50M/50K/26.2/30K
When is Sean O'Brien 100K/50M/50K/26.2/30K 2027?
Sean O'Brien 100K/50M/50K/26.2/30K 2027 is on Saturday, January 30, 2027.
Where is Sean O'Brien 100K/50M/50K/26.2/30K?
Sean O'Brien 100K/50M/50K/26.2/30K is held in Calabasas, California.
How long is Sean O'Brien 100K/50M/50K/26.2/30K?
Sean O'Brien 100K/50M/50K/26.2/30K is 50 miles (80 km).
What is the weather usually like at Sean O'Brien 100K/50M/50K/26.2/30K?
Around Sean O'Brien 100K/50M/50K/26.2/30K's date, the day's high is typically about 63°F (17°C) and the low about 46°F (8°C), averaged over recent years.
What other 50-mile and 100K races are there in California?
Other upcoming 50-mile and 100K races in California include Anza Borrego Cuyamaca 50 Mile Run (December 5, 2026), Ray Miller 50/50 (December 5, 2026) and Hunter S. Thompson Fear & Loathing (December 6, 2026).
Other races in California
- Sean O'Brien 100K · Jan 30, 2027
- Jed Smith 50 Miler · Feb 6, 2027
- Monterey Ultra 50 Mile · Feb 6, 2027
- Happy Chinese New Year 50 Miler · Feb 20, 2027
- SoCalUltraTrail at Tejon Ranch 100K · Feb 27, 2027
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