Are you up for the ultimate challenge? The Century From Hell packs a whopping 9251′ of climbing into this beautiful and tough 101-mile course. This Century has it alljaw-dropping coastal vistas, punishing mountain climbs through ancient redwood groves, crystalline reservoirs and pristine watershed areasthe very best that San Mateo County has to offer!

Named as one of “NorCal’s Top 10 Gran Fondo and 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.

For 2019, all three of our road ride routes have been enhanced for your safety and enjoyment, and now include a scenic detour through the peaceful, winding backroads of Half Moon Bay. See map below for more details.

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

Before you sign-up, you should be aware that the 9251′ elevation gain is mostly concentrated within a 20-mile stretch. While it’s not our goal to discourage anyone from testing his or her limits, we recommend this ride only for those who have a realistic shot at completing the course in 10.5 hours or less, barring extreme weather conditions, because SAG patrols make their final rounds and aid stations close down at 5 PM. We want to make sure that you enjoy the benefit of full support throughout your ride and have the most successful, enjoyable experience possible.

There are five aid stations plus a hydration stop along the course (see map below for exact locations). Check our Early Packet Pick-Up & Event Day page for starting times and additional details. You can also follow us on Twitter and Facebook.

If you have specific questions about the course, please email us at or use the Contact form below.


  • 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.