Event Date:April 24, 2022


Only the fittest (or craziest!) runners ever attempt back-to-back marathons…much less six days and 3,000 miles apart! The planned 2022 race will mark the 11th presentation of the Boston 2 Big Sur Challenge and we hope to welcome 400 of the world’s fittest athletes to participate in two of the world’s greatest marathons. HOKA is the official sponsor of Boston 2 Big Sur. All B2B participants will receive exclusive gear and other unique, quality items.



Click for Marathon Race Details


Entry fee is $530

Registration Timeline:

  • 11/8/21 – 11/12/21: Registration for the 2022 Boston Marathon will take place
  • 12/1/21 – 12/5/21: 2020 B2B priority entrants who registered for the 2022 event will be asked to upgrade their entry into the Boston 2 Big Sur category once they have officially been accepted into the 2022 Boston Marathon (this schedule anticipates that all Boston Marathon time qualifier applicants will be notified of their Boston entry status on or before the first few days of December)
  • 12/8/21: All remaining B2B entries will be released to the general public, first come – first served at 9am PST. Note that registration in the Boston 2 Big Sur division is open only to confirmed entrants in the April 2022 Boston Marathon.

To qualify for the challenge, you must also be an official entrant in the April 2022 Boston Marathon. You can register for Boston either through your qualifying time, through one of their charity programs, or by invitation. B2B registration fees do not cover your Boston entry.

NOTE: 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.


  • An entry into the 2022 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 long-sleeve tech shirt
  • A unique B2B finisher’s medallion (you will also receive a BSIM finisher medallion)
  • Access to a catered B2B hospitality finish tent in the Finish Village. You can purchase Guest Passes for friends and family to join you in the tent for $40 (ages 11 and older), $25 (ages 4-10) and FREE for children under age 4.
  • The pride of being one of the few to undertake this challenge of completing two iconic marathons only six days apart in 2022 (based on planned race dates).



Awards will go to the top three men and women under age 40 and the top three Masters men and women, age 40 and over. Awards are based on combined Boston and Big Sur chip times.

The Awards Ceremony begins at 11:30 AM in the Finish Village.