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Boston 2 Big Sur Challenge


The 2018 Challenge:
2 marathons
2 coasts
13 days

B2B Logo 2018

Only the fittest (or craziest!) ever attempt back-to-back marathons, much less 3,000 miles apart. 2018 will mark the ninth presentation of the Boston 2 Big Sur Challenge and we will welcome 400 of the world's fittest athletes to participate in two of the world's greatest marathons. 


The 2018 Boston 2 Big Sur Challenge is SOLD OUT!

  • If you are already registered for the Big Sur Marathon by way of the random drawings conducted in July and August, you will still need to register for B2B separately. Once registered, email sally@bsim.org to have your original open registration voided and refunded. If you do not get into B2B, you can still run the Big Sur Marathon but without the B2B perks. 

All B2B participants will receive the following:

  • Your entry into the 2018 Big Sur Marathon as a B2B Challenge runner
  • A Boston 2 Big Sur finisher jacket in gender-specific sizing (will be distributed in the B2B finish hospitality tent along with the B2B medallion)
  • A Boston 2 Big Sur training shirt in gender specific sizing
  • custom participant bib and unique B2B finisher's medallion (you will also receive a BSIM finisher medallion)
  • Access to a catered B2B hospitality finish tent in the Big Sur Marathon Finish Village. You can purchase guest passes for friends and family to join you in the tent for $25 per ticket.
  • Awards are presented race day to the top five male and female participants based on their combined Boston and Big Sur times.

The Big Sur Marathon will officially end at 1 PM when the course will reopen to regular two-way vehicular traffic.  There will be NO support of any kind on the course (aid stations, medical, communications, etc.) for anyone not maintaining a 6-hour pace.Those who do not reach marathon mile 21.2 by 11:50 AM will not be allowed to proceed past that point and will be provided transportation to the finish. Official finish times, medallions, certificates, and post-race refreshments are only available for runners who finish under six hours (chip time).

Challenge rules include:
  • To qualify for the challenge, you must also be an official entrant in the 2018 Boston Marathon. You can register for Boston either by your qualifying time or through one of their charity programs.  B2B registration fees do not cover your Boston entry.
  • If you are registered for B2B and Boston, but do not start or finish at Boston, you are no longer eligible for the B2B Challenge, medallion or finisher jacket. 

Questions? Or, for more information, email sally@bsim.org or call 831.625.6226

 2018 Boston 2 Big Sur Training Shirts
                        Women's 2018 Training Shirt                                                            Men's Training 2018 Shirt