RunRace USA › California › Doomsday
Doomsday
Cool, California · Saturday, December 12, 2026 · 50K, Half Marathon
Official race page & registration ↗Doomsday takes place on Saturday, December 12, 2026 in Cool, California. The race offers 2 distances: 50K, Half Marathon. For anyone travelling in, Granite Bay is about 12 miles away and Sacramento is about 33 miles away.
It is one of 123 races on the California calendar that December.
- Date
- Saturday, December 12, 2026
- Location
- Cool, California
- Distances
- 50K, Half Marathon
Listing from the 2026 race calendar, refreshed nightly. Details can change: confirm date and entry on the official race page before travelling. Spot an error? Tell us here.
Making a race weekend of it?
Stay near the start line in Cool: check in Dec 11, out Dec 13.
Common questions
When is Doomsday?
Doomsday is scheduled for Saturday, December 12, 2026.
Where is Doomsday held?
Doomsday is held in Cool, California. It is about 12 miles from Granite Bay and 33 miles from Sacramento.
What distances does Doomsday offer?
The listed distances are 50K, Half Marathon.
How do I register for Doomsday?
Registration is handled on the official race page, linked at the top of this listing. Entry can close early if the race sells out.
More races nearby
- Dec 1212K's of ChristmasRedding, CA
- Dec 122026 Hark the Herald Half Marathon & 10KTiburon, CA
- Dec 122026 Rancho Cordova PAL Holiday RunRancho Cordova, CA
- Dec 1250th Annual Holiday Run and Walk for HealthAntioch, CA
- Dec 12‘A CHARLIE BROWN CHRISTMAS 5K/10K’ (Los Angeles, CA)Los Angeles, CA
See every race on the California calendar, California Half Marathons, California Ultras, or use the Race Finder for maps and filters.