06/26/2026
The 2027 race date is set for Jan 30th!
Registration opens this Wednesday July 1st on UltraSignup at 6am use code "khraces" for $15 off any distance.
Register here:
Sean O'Brien 100K/50M/50K/26.2/30K January 30, 2027: 100K race in Calabasas, CA. Organized by Keira Henninger Events. Register now on UltraSignup.