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The 100K gravel route explores some of the greatest hits in our wonderful East Bay Regional parks. The first half of the day will take you through Sibley, Tilden and Wildcat before turning south to revisit Sibley en route to Chabot where the difficulty ramps up! The route covers about 63 miles with about 7,200 ft of elevation gain. This route will challenge you while helping sharpen your early season fitness and affording you the beauty of the East Bay.

Alternative Car-Free Start

The alternative start in Tilden Park is not available for this route. You must sign in at St Mary's College.


Below is a tentative map. You will receive a final map at registration. Note that you can click on View Full Version to see more details or Send to Device to export files suitable for your GPS device.

View from the gravel route
by Mike Wood