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Doomsday - Cool, CA

Cool, United States • 13 Dec 2025

Doomsday is a challenging running event held in Cool, California, featuring a 50K ultramarathon and a Half Marathon. The race takes place on a scenic course with significant elevation changes—5,100 feet gain/loss for the 50K and 1,250 feet for the Half Marathon. Both distances start together at the Cool Staging Area.

The event welcomes hikers and allows trekking poles, with generous cutoff times of 9.5 hours for the 50K and 5 hours for the Half Marathon. Participants enjoy high-quality finisher medals, race shirts, and thrilling surprises along the course. The race is limited to 200 runners, creating an intimate and supportive atmosphere. Visit the organization's website for the most recent information.

United States California Cool

Race information

Registration Facebook
50 km
5100 m+
50k
13 mi
1250 m+
Half Marathon
Visit the organization's website for the most recent information.
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