Mt. Diablo Half Marathon
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Mt. Diablo Half Marathon
The Mt. Diablo Half Marathon is a point to point 13.1 mile race from high on Mt. Diablo State Park into Walnut Creek, California, held on April 24, 2027. The course begins above the clouds at 3,849 ft and follows quiet park roads, descends through oak dotted foothills and tree lined Walnut Creek neighborhoods, and finishes at Arbolado Park.
The route has a net descent of 3,664 ft. The course is closed in the park and spectators are not allowed there. There are four aid stations offering water, electrolytes, and fruit, and pace teams are listed for finishing windows between 1:30 and 2:30. Finishers receive a custom medal and a finish area gathering is provided at Arbolado Park.
The event is produced by Team Blue Sky Events in partnership with the City of Walnut Creek. Entry is limited to 1,344 runners. Pricing is offered in three windows: Early Bird at $115 through September 30, 2026; Standard at $135 from October 2026 through February 2027; and Final at $155 from March 2027 through race week.
The course description and race details emphasize the downhill profile, aid station support, field cap, and organizational partners. Visit the organization's website for the most recent information.
