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Diablo Trails Challenge
A Trail Run for Everyone - 5K, 10K, Half Marathon, 50K
April 15, 2017

Diablo Trails Challenge has a run for everyone from those hitting the trail for the first time to experienced ultra-runners with a 5k, 10k, Half Marathon and 50k. Hosted by Brazen Racing, this fundraising run for Save Mount Diablo showcases just a fraction of the Diablo wildernesses’ beauty and helps Save Mount Diablo to preserve, defend and restore more land for you, wildlife and future generations to enjoy.

The 5k, 10k, Half Marathon and 50k will all begin and end at Castle Rock Recreation Area in Diablo Foothills, Walnut Creek. All races will be professionally timed. All runners receive medals and T-shirts after the race. More information and more photos from Brazen Racing.

Visit Brazen Racing for more information.

2017 Participants: You came... and you conquered!

Thank you for running on the mountain... for the mountain! 

You took on the challenge to help protect your playground. You spent a lovely day on Mount Diablo and helped save more of it for you, wildlife and future generations to enjoy.  Your support is what makes creating a national park-sized open space in your backyard possible. Thank you! Keep on running to help us raise awareness and save more of the Diablo wild lands--so that you and all of the trail runners of tomorrow can continue to embrace these beautiful, wide open spaces and natural lands.

Photo Gallery
See the gallery of photographs from the 2017 Diablo Trails Challenge.

Get your results from the 2017 Diablo Trails Challenge.

We photograph, video and audio-record throughout the event. By entering the space and joining the gathering, you are granting us permission to record you. Save Mount Diablo retains the right to use, reproduce and distribute such media from these events.

Thanks to all participants, volunteers, Park Rangers, HAM radio volunteers, Contra Costa Sheriff's Search and Rescue Teams and sponsors for making this run possible.  The hills are usually luscious green showing off the Diablo area and the lands Save Mount Diablo is helping to preserve.




“What makes this a unique trail event are the Search and Rescue volunteers, on-course radio communications and timing chips. Also, it benefits Save Mount Diablo, enabling people to safely explore new, unfamiliar terrain (including new trails, and new off-road courses for people who've only run roads in the past). It's much more of an adventure than any road run you'll do!” – Dave, Danville

"You and the Save Diablo volunteers did a super great job putting on the race and introduced many people, including me, to beautiful trails that we never knew existed. The aid people were plentiful and enthusiastic."

"I came for inspiration and self-revelation through a mixed feeling of suffer and grand breathtaking scenery. I felt touched at every steps and every bit of service from the volunteers. Thanks to all who helped make our day!!"

"I love the concept of going through at least 5 parks-from Round Valley to I believe Los Vaqueros Watershed to Morgan Territory into Mount Diablo State Park and veering into Shell Ridge Open Space before finishing back up at Castle Rock Park. I especially appreciate all who put the event to together and made it happen such as Mike Palmer and the Save Mount Diablo Committee. And a special thanks to those who marked the course-they did a Great Job!-I usually go off the course in almost every 50 K I’ve done-this one I remained on the Course the whole way."

"I look forward to running the event next year. I will now be able to give more info to my customers about this wonderful event! You all did a great job from start to finish. I am so happy an organization is in place so that we all can have this wonderful mountain to play on." Roberta McGraw, employee of Forward Motion

"Thank you to everyone involved in Sunday's run. Although I was cursing a little toward the end, a day later I am reflecting back with a very happy and positive feeling. The aid stations were great, the volunteers were even better. All the volunteers had infectious energy all the way through to the end! The hills and views were the best I've seen on any course and I had a feeling of pride, running (and completing) the first official Diablo 50K. The course was beautifully challenging (and the wind didn't make it any easier). "


  Credits | Legal StatementCopyright 2012 Save Mount Diablo. Designed by Alison Martin. Funded by Clif Bar.