In 65 days · Fri, Jan 1, 2027
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Friday, January 1st, 2027
17600 Lake Chabot Road, Castro Valley CA
5K · 10K · Half
44–56°F · some rain risk
See last 10 years
On this date: rain 1 of the last 10 years
2026
49–59°F
rain
2025
38–54°F
dry
2024
46–58°F
dry
2023
44–59°F
dry
2022
35–50°F
dry
2021
39–56°F
dry
2020
45–59°F
dry
2019
38–52°F
dry
2018
44–61°F
dry
2017
44–50°F
dry
Best months to race in California →
About this race
The sun is rising on Friday morning, January 1st, the first day of 2027. Where should you be? Pounding the trails of Lake Chabot, of course!
Join us at Lake Chabot in Castro Valley for the scenic and invigorating 5K, 10K or half marathon.
Better yet, make sure you run at the Brazen New Year's Eve race and then you can start 2026 with the highly coveted New Year Mega Medal! Learn about our Brazen New Year's Eve race here.
Take it even one step higher by running both half marathons (one on 12/31 and one on 1/1) and then brag to your friends: "It took me two years to finish that marathon"!
Course map
Train with a club
Run clubs near Castro Valley to train with before race day.
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