In 243 days · Sat, Apr 24, 2027
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Saturday, April 24th, 2027
Summit Rd, Walnut Creek CA
Half
42–64°F · low rain risk
See last 10 years
On this date: rain 0 of the last 10 years
2026
42–58°F
dry
2025
41–53°F
dry
2024
42–59°F
dry
2023
41–67°F
dry
2022
40–68°F
dry
2021
41–56°F
dry
2020
49–80°F
dry
2019
53–78°F
dry
2018
46–72°F
dry
2017
42–52°F
dry
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About this race
Mt. Diablo Half Marathon
Date: April 24, 2027
Location: Summit Rd, Walnut Creek, CA
URL: Race Details
Event Overview
13.1 miles descending from Mt. Diablo, finishing where open-space beauty meets Walnut Creek's relaxed, upscale energy. A new race from the team that has produced East Bay events since 1995.
Registration Includes
- Custom Wrist Band: for all AM access
- Scenic Bus Transfer: to Summit Start
- Warm Beverages: on the Mountain
- Bib w/ Chip Timing:
- Custom Shirt:
- Custom Finishers Medal:
- Morning Welcome: & Goodie Bag on bus
- Cold Weather Bag: Transported to Finish
- Gloves &: Mylar Blanket:
- Warm Lunch: Served at Finish Line
- Post-Race Shuttle Service:
The Race Experience
Start above the clouds. Finish in the park, surrounded by Walnut Creek energy.
From high on Mt. Diablo State Park, the course descends along quiet park roads, passes through the oak-dotted Diablo foothills, and continues into Walnut Creek's tree-lined neighborhoods before finishing at Arbolado Park.
Course Details
- Closed Course: No spectators allowed in the park
- Aid Stations: Four aid stations with water, electrolytes, and fruit
- Pace Teams: from 1:30 to 2:30
Packet Pickup
Packets can be mailed to any registered runner for an additional fee, selected at sign-up. Otherwise, pick up your packet at one of the windows below. There is no race-morning pickup: runners who do not mail their packet or attend a pickup will forfeit their registration.
- Saturday, April 17: 10:00 AM – 6:00 PM / Location TBD
- Sunday, April 18: 10:00 AM – 6:00 PM / Location TBD
- Friday, April 23: 10:00 AM – 6:00 PM / Location TBD
On Race Day
Parking: All registered runners park at 2125 Oak Grove Rd., Walnut Creek. Your race confirmation assigns a wristband, a bus number, and a departure time of either 5:30 AM or 7:00 AM.
Shuttles: Once you have your cold-weather bag, board the return shuttle at the corner of Oak Grove and Arbolado Drive with your wristband on. Shuttles run back to the morning parking lot. Specific return-shuttle timeframes will be posted closer to race day.
Medical Support
Each aid station will have basic first-aid supplies available, including bandages, moleskin, Vaseline, anti-inflammatory medication, and other common runner-support materials. Participants needing assistance may stop at any aid station and ask the volunteers for help.
Awards
Age-group awards will be presented after the race, with medals given to the top three male and female finishers in each age division.
Contact Us
Race questions, sponsorship inquiries, partnership ideas, or press requests. We respond within one business day. Submissions are routed to info@teamblueskyevents.com.
Course map
Train with a club
Run clubs near Walnut Creek to train with before race day.
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