Are you up for the ultimate challenge? The Century From Hell packs a whopping 9,251′ of climbing into this beautiful and tough 101-mile course. This Century has it all — jaw-dropping coastal vistas, punishing mountain climbs through ancient redwood groves, crystalline reservoirs and pristine watershed areas — the very best that San Mateo County has to offer!

Named as one of NorCal’s top 10 century rides, the Century From Hell has earned a reputation among hardcore cyclists as a “must-do” ride; a real challenge of strength, grit and endurance.

Riders under 18 must be accompanied by a parent or guardian.

Video from the 2017 Century From Hell courtesy of the ChiDonChea Channel on YouTube.

There are five aid stations plus a hydration stop along the course (see map below). Follow us on Twitter, Facebook and Instagram to get the latest updates.

If you have questions, please email us at


  • All Aid Stations will be closed and SAG patrols will be making their final rounds at 5:00 PM.
  • Routes are subject to change based on CalTrans and local government requirements and/or weather conditions.