The Diablo Trails Challenge is a popular trail race held in Mount Diablo State Park, California, attracting both seasoned ultramarathoners and trail running enthusiasts. The event features multiple race distances, including 50K, 30K, and 12K, all of which take participants through challenging terrain with significant elevation gain. Runners are treated to panoramic views of the Bay Area, making it not only a test of endurance but also a visually rewarding experience. Known for its challenging course and well-organized event, the Diablo Trails Challenge is a must-do race for trail running lovers in the region.
Races
50km
Half Marathon
10km
5km
On April 5, 2025, the Diablo Trails Challenge 50K will test runners with 2,137 meters of elevation gain across the rugged trails of Mount Diablo, California. Hosted by Brazen Racing, this ultramarathon combines breathtaking views with a challenging course starting at Castle Rock Recreation Area.
The Diablo Trails Challenge Half Marathon on April 5, 2025, offers 731 meters of elevation gain along the scenic trails of Diablo Foothills Regional Park. With its mix of challenging climbs and sweeping views, this race is perfect for trail enthusiasts.
The Diablo Trails Challenge 10K on April 5, 2025, features a manageable yet exciting 278 meters of elevation gain. Starting at Castle Rock Recreation Area, this race offers runners a taste of the stunning trails that Mount Diablo has to offer.
The Diablo Trails Challenge 5K, held on April 5, 2025, is a family-friendly race with 86 meters of elevation gain. Perfect for beginners or casual runners, this event highlights the beauty of Castle Rock Recreation Area and its surrounding trails.
Weather based on historical averages.
FAQs
What is the Diablo Trails Challenge?
How long is the Diablo Trails Challenge?
Where does the Diablo Trails Challenge take place?
What is the elevation gain of the Diablo Trails Challenge?
How can I prepare for the Diablo Trails Challenge?
How do I choose the right training plan for the Diablo Trails Challenge?
On April 5, 2025, the Diablo Trails Challenge 50K will test runners with 2,137 meters of elevation gain across the rugged trails of Mount Diablo, California. Hosted by Brazen Racing, this ultramarathon combines breathtaking views with a challenging course starting at Castle Rock Recreation Area.
The Diablo Trails Challenge is 50km long.
The Diablo Trails Challenge takes place in Walnut Creek, California, USA.
The Diablo Trails Challenge elevation gain is 2137 metres, which Runna classifies as a Hilly race.
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Diablo Trails Challenge?
On April 5, 2025, the Diablo Trails Challenge 50K will test runners with 2,137 meters of elevation gain across the rugged trails of Mount Diablo, California. Hosted by Brazen Racing, this ultramarathon combines breathtaking views with a challenging course starting at Castle Rock Recreation Area.
How long is the Diablo Trails Challenge?
The Diablo Trails Challenge is 50km long.
Where does the Diablo Trails Challenge take place?
The Diablo Trails Challenge takes place in Walnut Creek, California, USA.
What is the elevation gain of the Diablo Trails Challenge?
The Diablo Trails Challenge elevation gain is 2137 metres, which Runna classifies as a Hilly race.
How can I prepare for the Diablo Trails Challenge?
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Diablo Trails Challenge?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Diablo Trails Challenge?
How long is the Diablo Trails Challenge?
Where does the Diablo Trails Challenge take place?
What is the elevation gain of the Diablo Trails Challenge?
How can I prepare for the Diablo Trails Challenge?
How do I choose the right training plan for the Diablo Trails Challenge?
The Diablo Trails Challenge Half Marathon on April 5, 2025, offers 731 meters of elevation gain along the scenic trails of Diablo Foothills Regional Park. With its mix of challenging climbs and sweeping views, this race is perfect for trail enthusiasts.
The Diablo Trails Challenge is 21km long.
The Diablo Trails Challenge takes place in Walnut Creek, California, USA.
The Diablo Trails Challenge elevation gain is 731 metres, which Runna classifies as a Hilly race.
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Diablo Trails Challenge?
The Diablo Trails Challenge Half Marathon on April 5, 2025, offers 731 meters of elevation gain along the scenic trails of Diablo Foothills Regional Park. With its mix of challenging climbs and sweeping views, this race is perfect for trail enthusiasts.
How long is the Diablo Trails Challenge?
The Diablo Trails Challenge is 21km long.
Where does the Diablo Trails Challenge take place?
The Diablo Trails Challenge takes place in Walnut Creek, California, USA.
What is the elevation gain of the Diablo Trails Challenge?
The Diablo Trails Challenge elevation gain is 731 metres, which Runna classifies as a Hilly race.
How can I prepare for the Diablo Trails Challenge?
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Diablo Trails Challenge?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Diablo Trails Challenge?
How long is the Diablo Trails Challenge?
Where does the Diablo Trails Challenge take place?
What is the elevation gain of the Diablo Trails Challenge?
How can I prepare for the Diablo Trails Challenge?
How do I choose the right training plan for the Diablo Trails Challenge?
The Diablo Trails Challenge 10K on April 5, 2025, features a manageable yet exciting 278 meters of elevation gain. Starting at Castle Rock Recreation Area, this race offers runners a taste of the stunning trails that Mount Diablo has to offer.
The Diablo Trails Challenge is 10km long.
The Diablo Trails Challenge takes place in Walnut Creek, California, USA.
The Diablo Trails Challenge elevation gain is 278 metres, which Runna classifies as a Hilly race.
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Diablo Trails Challenge?
The Diablo Trails Challenge 10K on April 5, 2025, features a manageable yet exciting 278 meters of elevation gain. Starting at Castle Rock Recreation Area, this race offers runners a taste of the stunning trails that Mount Diablo has to offer.
How long is the Diablo Trails Challenge?
The Diablo Trails Challenge is 10km long.
Where does the Diablo Trails Challenge take place?
The Diablo Trails Challenge takes place in Walnut Creek, California, USA.
What is the elevation gain of the Diablo Trails Challenge?
The Diablo Trails Challenge elevation gain is 278 metres, which Runna classifies as a Hilly race.
How can I prepare for the Diablo Trails Challenge?
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Diablo Trails Challenge?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Diablo Trails Challenge?
How long is the Diablo Trails Challenge?
Where does the Diablo Trails Challenge take place?
What is the elevation gain of the Diablo Trails Challenge?
How can I prepare for the Diablo Trails Challenge?
How do I choose the right training plan for the Diablo Trails Challenge?
The Diablo Trails Challenge 5K, held on April 5, 2025, is a family-friendly race with 86 meters of elevation gain. Perfect for beginners or casual runners, this event highlights the beauty of Castle Rock Recreation Area and its surrounding trails.
The Diablo Trails Challenge is 5km long.
The Diablo Trails Challenge takes place in Walnut Creek, California, USA.
The Diablo Trails Challenge elevation gain is 86 metres, which Runna classifies as a Moderate race.
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Diablo Trails Challenge?
The Diablo Trails Challenge 5K, held on April 5, 2025, is a family-friendly race with 86 meters of elevation gain. Perfect for beginners or casual runners, this event highlights the beauty of Castle Rock Recreation Area and its surrounding trails.
How long is the Diablo Trails Challenge?
The Diablo Trails Challenge is 5km long.
Where does the Diablo Trails Challenge take place?
The Diablo Trails Challenge takes place in Walnut Creek, California, USA.
What is the elevation gain of the Diablo Trails Challenge?
The Diablo Trails Challenge elevation gain is 86 metres, which Runna classifies as a Moderate race.
How can I prepare for the Diablo Trails Challenge?
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Diablo Trails Challenge?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
More
Sport:
Running
Tags:
Nature
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by Diablo Trails Challenge or Brazen Racing. All event details are based on publicly available information and are provided solely to help users discover running events. Runna does not use any official logos, images, or proprietary content from this event or its organiser. Any trademarks or names mentioned are used descriptively to identify the event in a factual manner. For the most accurate and up to date information (including to register or purchase an entry to the event), please visit the Diablo Trails Challenge website.
