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Fourmidable

Auburn, United States • 21 Feb 2026

Event overview

The FOURmidable trail races take place on trails in the Sierra Nevada foothills near Auburn, CA. The event date is Saturday, Feb 21, 2026. The listed venue address is 298 Pacific Ave., Auburn, CA. Distances offered:

  • 50K
  • 35.5K
  • 1/2 Marathon
  • 13K

Registration closes on Thu, Feb 19, 2026 at 11:59 PM PT.

Prizes and awards

Prize money for 2026 will come from runner donations that the organizer will match 100% up to $3,000. The pooled prize money will be divided equally between genders, then within each gender split as 50% to 1st place, 30% to 2nd place, and 20% to 3rd place (applies to the 50K prize purse). An additional $500 award will be given to the first runner who breaks the existing course record in each gender; this course-record award applies only to the 50K. Visit the organization's website for the most recent information.

United States California Auburn

Race information

Website Registration
50 km
50k
36 km
35.5k
Half Marathon
1/2 Marathon
13 km
13k
Visit the organization's website for the most recent information.
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