California · Mt. Diablo Half Marathon
Mt. Diablo Half Marathon
Mt. Diablo Half Marathon is a Mt. Diablo Half Marathon event held in Walnut Creek, California. Its next confirmed date is Saturday, April 24, 2027. About 1,344 runners take part across all distances.
- Race day
- April 24, 2027
- Location
- Walnut Creek, CA
- Field size
- ~1,344 runners
Race details
- Date
- Saturday, April 24, 2027
- Location
- Walnut Creek, California
- Distances
- Mt. Diablo Half Marathon
- Field size
- About 1,344 runners
- Registration
- raceroster.com
Registration, course & weather
- Registration status
- Registration status as last checked October 18, 2026: closed
About the Mt. Diablo Half Marathon
Mt. Diablo Half Marathon in Walnut Creek, CA.
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Guides from the RaceRove blog
- 8 min read How to Choose the Best Half Marathon for a PR, Racecation or 50-State Challenge The best half marathon depends on what you want from it. How to choose a course for a personal record, a race worth travelling for, or an efficient stop on a 50-state challenge.
- 7 min read How to Find a 5K, 10K, Half Marathon or Marathon Near You A practical way to find running races near you: pick a distance, decide how far you'll travel, read the listing properly and confirm the details before you register.
- 9 min read How to Run a Race in All 50 States How to plan a 50-state running challenge: set your own rules, group states into trips, build a calendar around the seasons, budget for it and keep track of every finish.
- Blog All guides Planning advice for finding, choosing and travelling to races.
Mt. Diablo Half Marathon: common questions
- When is the Mt. Diablo Half Marathon?
- The next confirmed date is Saturday, April 24, 2027.
- Where is the Mt. Diablo Half Marathon held?
- In Walnut Creek, California.
- What distances does the Mt. Diablo Half Marathon offer?
- Mt. Diablo Half Marathon.
- How many people run the Mt. Diablo Half Marathon?
- About 1,344 runners across all of its distances. That figure is an estimate of the field size, not an entry cap.
- How do I register for the Mt. Diablo Half Marathon?
- Registration is handled by the organiser at raceroster.com. Entry fees, caps and deadlines are set there.
- Is registration open for the Mt. Diablo Half Marathon?
- Registration status as last checked October 18, 2026: closed.
Plan this race in RaceRove
Save it to your plan, compare it with other races, check typical race-day weather and track your 50-state progress in the interactive app.