Doomsday 50K & Half Marathon
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Doomsday - December 12, 2026
Doomsday is an in-person trail running event in Cool, CA, held at the Cool Staging Area (7200 Saint Florian Court). Two distances are offered with live tracking and real-time results available for each course. Total field size is limited to 200 runners.
Cutoff times are published for each distance and the courses are described as hiker and back-of-the-pack friendly; trekking poles are allowed. Parking fees are not included in registration; participants should display a Golden Poppy Pass or purchase a day use pass for $10 cash at the parking entrance. Volunteers will direct parking to the Day Use Lot or overflow areas.
Packet pick-up is available early on Friday, December 11 at Auburn CrossFit, and race-morning packet pick-up is held at the race start location. The event provides course maps, GPX files, and Strava routes through partnered services. Aid stations are located along the courses with multiple named stops on the 50K and a single aid station on the Half Marathon.
Participants receive an event shirt and a weighted finisher medallion. Top-three men and top-three women in each distance receive custom three-dimensional trophies with the race logo. Registration closes on Monday, December 7 at 11:59 PM PT. Visit the organization's website for the most recent information.
- 50K 5,100 feet gain/loss
- Half Marathon 1,250 feet gain/loss
