Online registration is now closed. 

We will have on site registration available the morning of the ride.


The Sonoma County Backroad Challenge is an annual fundraising project of the Petaluma Sunrise Foundation. The Petaluma Sunrise Foundation, a 501(c)(3) Charitable Foundation, was established in 2010 by the Rotary Club of Petaluma Sunrise. Your participation in the Backroad Challenge as a rider, sponsor, volunteer or vendor allows us to continue to do great things for the community and internationally.

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  • Cycle the backroads of Sonoma and west Marin Counties
  • Well-stocked rest stations, SAG support, clearly marked courses
  • Great Festival after the ride including chicken BBQ, cold beer from local artisan craft brewers, live music and friends
  • Your participation helps us fund worthy causes including the work of local non-profits and humanitarian projects

Eventbrite - Sonoma County Backroad Challenge Cycling Event- 5th Annual

The Routes

See All RoutesThe course routes for the May 22, 2016 ride have now been finalized by the course committee.  The committee considered road safety, accessibility to rest stations, and continuity in the ride in finalizing these routes.  As such, it was decided that the routes will run counter-clockwise as they did at our first Backroad Challenge in 2011. This configuration will be safe, make rest stations much more accessible, and will be more rider friendly when considering climbs, wind, and other factors.  We are sure you will find improvement in the routes over the clockwise configuration used in 2012 and 2013. We provide more specific information for each route on the Routes page.

See all Routes »

2016 Backroad Challenge Jerseys are here!


Sport our super stylish 2016 Backroad Challenge made by Voler and look your best while enjoying the amazing Sonoma County scenery! Starting from $77.

Orders $75 or more will receive free USPS shipping.

View Our Collection Here >>


The Backroad Festival at Penngrove Park will be in full swing when you finish your ride.  Enjoy a delicous BBQ chicken meal prepared by the Penngrove Social Firemen, live music, exhibits, and an extensive beer garden featuring several local craft breweries.