Registration for the following events is now open:
  • Marathon Relay (both new teams and team members joining an existing team)
  • 21-Miler
  • 11-Miler
  • 12K
  • 5K
  • 3K


SOLD-OUT EVENTS include the Marathon (including the JUST RUN and RW VIP categories), and Boston 2 Big Sur.


Other Marathon registration opportunities available by:

All event entry fees can be viewed HERE.

If you have any questions about registration, please email the registrar at sally@bsim.org or call Active.com at 877.228.4881.
For general race questions, email info@bsim.org or doug@bsim.org or call 831.625.6226 during normal business hours. 


The entry confirmation page at Active.com is currently disabled. In the near future you’ll be able to confirm your entry by going to My Events at Active.com.

If you received a confirmation email, then you are registered for an event. If you did not receive one, be sure to check your spam and all mail folders.

For a copy of your confirmation, you can email the Registrar at sally@bsim.org.

Bib numbers will be assigned in mid-April and emailed/texted to all registered participants during the week prior to the race. Once assigned, they may also be looked up on our mobile app. To download the app, search for BSIM Events by Racemine.

We apologize for any inconvenience.

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