Photos from the Save Mount Diablo and Brazen Racing Diablo Trails Challenge. The 50K starts at Round Valley Regional Preserve near Brentwood and 7000+ ft of climbing later, ends at Castle Rock Regional Park near Walnut Creek. For more information on Save Mount Diablo and the Trails Challenge see:

http://www.savemountdiablo.org/activities_events_50k.html
2012 Diablo Trails Challenge 50K2013 Diablo Trails Challenge 50K2015 Diablo Trails Challenge 50K2016 Diablo Trails Challenge 50K2017 Diablo Trails Challenge 50K