

2026 Almost New Year's Eve
Almost New Year's Eve: a festive trail half at Lake Chabot to close out the year.
Race Date
Dec 31, 2026
Location
Castro Valley, CA
Quick facts
- Date
- Thursday, December 31, 2026
- Location
- Castro Valley, California
- Distance
- Half marathon (13.1 mi)
- Course
- Loop Course
- Terrain
- Trail
- USATF certified
- Not listed
Highlights
Good For
Atmosphere
The Experience
Celebrate the final miles of the year on the trails of Lake Chabot with Brazen Racing's Almost New Year's Eve event. Now in its 14th edition, this half marathon draws around 360 runners from some 13 states, with nearly a quarter returning year after year. The course loops the lake on dirt trails, offering a serene forest setting with waterfront views. The flat profile—elevation gain near zero—makes it an accessible option for runners of all levels, and the festive atmosphere encourages holiday spirit.
Race day in late December typically brings cool temperatures around 44–55°F and occasional rain, so a light jacket and trail shoes are wise. The event is part of a weekend doubleheader: run this half on Saturday and a second on New Year's Day to earn a coveted mega medal. With well-organized Brazen Racing logistics and a low-key, community vibe, it's a fitting way to ring in the new year without the crowds. The finish line festivities and the chance to log final miles in a beautiful setting make this a hidden gem for local trail runners.
Race-provided description
This is a trail race held at Lake Chabot in Castro Valley on New Year's Eve, offering half marathon, 10K, and 5K distances. It is part of Brazen Racing's New Year's weekend events, with an option to run a second half marathon on New Year's Day to earn a mega medal. The course is on trails, and the event is known for its festive atmosphere and opportunity to log final miles of the year.
Logistics
Race Day
Thursday, December 31, 2026
Start Time
TBA
Start Location
17600 Lake Chabot Road, Castro Valley, CA, 94546
Course Info
Course Type
Loop Course
Terrain
trail
Scenery
Lake River, Forest
Surface
Dirt Trail
Difficulty
Rolling Hills
Quality Score
Standout7414 years running
~364 finishers a year
shrinking
23% returning runners
5 timing sources
runners from 13 states
winner 1:35:28
typical high 56°F
Race Day Weather
5-year historical avgStart (Low)
44°
Afternoon (High)
55°
Ideal racing weather — cool and comfortable
0.4"
Precipitation
10 mph
Wind
84%
Humidity
Frequently asked
When is the 2026 Almost New Year's Eve?
The 2026 Almost New Year's Eve is held on Thursday, December 31, 2026.
Where does the 2026 Almost New Year's Eve take place?
It takes place in Castro Valley, California.
What distances does the 2026 Almost New Year's Eve offer?
The half marathon (13.1 miles).
Is the 2026 Almost New Year's Eve course flat and good for a PR?
The 2026 Almost New Year's Eve is a rolling hills, loop course course.
HalfRuns editorial — independent, no paid placement.
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