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Event details
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Get out for a beautiful Mount Diablo running event this August. With running options ranging from 4 miles right up to 50Ks runners of all stripes will be able to find something for them. Grab your shoes and hit the trail for that awesome finisher's medal and t-shirt.

Diablo Trail Run routes

Get out for a stunning run up Mount Diablo this August. This is the perfect way to round out your summer and enjoy the beautiful views of the Bay Area and Mitchell Canyon.

If you are looking for an easier route with less hill climbing then perhaps the 4 miler is for you, but if you are looking for a bit more of a challenge then consider signing up for the half marathon (or even the 50K).

Terrain: The course takes place largely on a dirt road up the side of the mountain, there will be portions of this race that will be on single track.

Elevation Gain: The 4 and 10 mile races will have between 400 - 2,400 feet of elevation gain, whilst the longer runs will range from 3,420 - 7,990 feet of elevation gain. These hills are not to be scoffed at so you better include some hill training in your schedule.

Event Details

What’s Included
  • Race entry
  • Finisher's medal
  • Finisher's t-shirt
  • Refreshments and aid stations
  • Professional chip timing
  • Online results
  • 50K finisher's will also receive a custom coaster
Raceday Logistics


7:00AM - Bib pick up at Mitchell Canyon Trailhead

8:00AM - 50K, Marathon, Half Marathon and 10-mile Starts

8:15AM - 4 mile Start

Please make sure you arrive with enough time to get parked, registered and warmed up before taking on this epic challenge.


Spectators are more than welcome to cheer on their family or friends as they head out on their run. Mount Diablo is a beautiful place to have a picnic and its a great way to unwind after a race.


Volunteers are a huge part of bringing Coastal Trail Run's epic races to life. Roles vary from race-to-race but often include manning aid stations, helping at registration, or distributing those cherished finisher's medals.

In return, you will receive a 'standard' entry into a race if you help for 5 hours, $25 discount (2 hours), or $15 (1 hour).

If you would like to find out more then simple fill out the form here:

Frequently Asked Questions

Do I need to bring my own cup to the Diablo run?
Yes, in an effort to protect the environment runners are asked to bring their own drinking bottles and cups that can be filled up at the aid stations.
How hilly is the Diablo run?
If you are doing the 4 mile run then course is fairly flat, but if you are tackling one of the longer trails then it can be quite a hilly course and you should make sure you've got some hill training in before taking it on.
Is there a time cut-off for the Diablo run?
Yes, there is a 9 hour limit for the Marathon and 50K races, so runners should make sure they are on track for completing this time.

Diablo Trail Run weather forecast

Clear throughout the day.

Predicted highs
Predicted lows
IconLight breeze possible, up to 8mph

Meet the organiser

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Our events are located in amazingly beautiful parks and recreation areas in California. We are known for our well-marked courses, accurately measured distances, immediate race results, quality shirt designs, and low-key, friendly atmosphere. For courses that are designed to be easier, flatter, and faster, check out one of our Zoom or ZombieRunner events. We have organized over 400 events during the past 16 years. We love trail running and we promise you a rewarding experience.



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