Fourmidable

FEB

21

2026

FOURmidable in Auburn CA offers rugged Sierra Nevada foothill trails with distances from 13K to 50K on Feb 21, 2026. Runner donations are matched to fund prize money and there is a bonus for breaking the 50K course records.

Sat 21 Feb 2026

Auburn, California

Website Registration

50 kilometers 36 kilometers Half Marathon 13 kilometers

Always double-check with the organizer's website! This page may contain affiliate links.

Event details

FOURmidable is a trail running event in Auburn, CA, scheduled for Saturday, Feb 21, 2026. The listed venue address is 298 Pacific Ave. Distances offered are:

50K
35.5K
1/2 Marathon
13K

The course runs on trails in the Sierra Nevada foothills and is described as rugged. Registration closes on Thu, Feb 19 at 11:59 PM PT.

Prizes and course records

Prize money for 2026 will be funded by runner donations and matched 100% by the organizer up to $3,000. The pooled money will be divided equally between genders; within each gender pool, payouts are allocated 50% to first place, 30% to second place, and 20% to third place. An additional $500 will be awarded to the first runner who breaks the current course record in each gender for the 50K. Current 50K course record times listed are 3:29:31 (male) and 4:06:58 (female). Visit the organization's website for the most recent information.

50 km

50k

36 km

35.5k

Half Marathon

1/2 Marathon

13 km

13k