We thank our 2023 sponsors and supporting organizations!
R&A Cycles provides
free1 mechanic support at the St. Mary's Start and at the Briones
Rest Stop.
Mike's Bikes of Berkeley
provides free1 mechanic support at Island Rest Stop.

Berkeley Cycle Works provides
free1 mechanic support at the Sunrise Rest Stop.
The Acme Bread Company of Berkeley
provides a variety of breads for the post-ride meal.





JAMBAR is a local organic energy bar
from San Rafael. Bicycling featured JAMBAR as 2023 Fitness Nutrition Award Winner.
Tastes delicious and 50% of net profit goes to sports & music programs.
Pre-Century Bike Checks
Some of our sponsors may be providing bike safety and performance inspections around the time of the century. Check back here for more information as the century date approaches.
Free Mechanic Support1
Free mechanic support during the century: Mechanics will provide free basic adjustments and repairs to century riders. Larger repairs are at the discretion of the mechanic. Don't expect a complete overhaul! Riders are expected to pay for materials and spare parts used.