Trail · Half Marathon
Doomsday
Cool, CA
Doomsday is a trail race of 13.1 miles (21.1 km) in Cool, California. The next edition is on Saturday, December 12, 2026.
There are 272 other upcoming races up to a half marathon in California.
13.1miDistance
53°Flow 36°FTypical race day
Questions about Doomsday
When is Doomsday 2026?
Doomsday 2026 is on Saturday, December 12, 2026.
Where is Doomsday?
Doomsday is held in Cool, California.
How long is Doomsday?
Doomsday is 13.1 miles (21.1 km).
What is the weather usually like at Doomsday?
Around Doomsday's date, the day's high is typically about 53°F (12°C) and the low about 36°F (2°C), averaged over recent years.
What other races up to a half marathon are there in California?
Other upcoming races up to a half marathon in California include Cahuilla Rez Ultra (November 14, 2026), Cahuilla Rez Ultra (November 14, 2026) and Crafton Hills Endurance Run (November 14, 2026).
Other races in California
- Crystal Cove Trail Run 15K · Dec 12, 2026
- Crystal Cove Trail Run 6K · Dec 12, 2026
- Holiday Hustle 5K, 10K Livermore 5K · Dec 12, 2026
- Holiday Hustle 5K, 10K Livermore 10K · Dec 12, 2026
- Jingle Bell Run for Toys for Tots 5K · Dec 12, 2026
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