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Sonoma County Backroad Challenge

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Distances in this event

  1. Century

    Bike 99.54mi
    Event passed
  2. Metric Century (Red)

    Bike 65.74mi
    Event passed
  3. Metric Century (Purple)

    Bike 46mi
    Event passed
  4. Half Metric Century

    Bike 36.52mi
    Event passed

From the organizer

Organizer's website

The Sonoma County Backroad Challenge is back! Once again we offer three spectacular rides the Century, the Metric Century, and the Half Metric Century along the byways through the scenic countryside of southwestern Sonoma and northwestern Marin.

What’s Included
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
Course Details

Half Metric

This course is mostly flat on the nicest roads possible. You won’t get too far out of town on this course but you’ll enjoy scenic views of the pasture lands and rolling hills that surround Petaluma. This ride is short, quick, and fun – we’ve designed it for beginning riders or for more experienced riders that for whatever reason want to have a less grueling ride.

Metric Century

This is an intermediate ride that will be perfect for experienced riders without the extreme endurance challenges of the Century Ride. New riders in good physical condition can certainly consider the Metric Century – just be prepared for a great workout.


Far and away, this is the most challenging ride. It is designed for very serious riders who are in great physical condition and experienced with significant elevation changes. If you are up for the Challenge, then this one is for you. It’ll be a long day in the saddle but you’ll be rewarded with some of the best scenic country that we have to offer in Sonoma County.

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