FOURmidable
Sat, Feb 20, 2027, 8:00 AM EST
- Location
- Auburn, CA
- 855 Pacific ave, 95603
- Type
- TRAIL
Sign up and verify details on the organizer’s official page.
At a glance
Double-check key detailsA challenging 50K trail race in Auburn, CA, set on mountainous terrain.
The FOURmidable 50K is a trail race in Auburn, CA, offering a demanding experience on mountainous terrain. This event is designed for runners seeking a significant challenge on natural surfaces. Participants can expect a straightforward registration and bib pickup process, focusing on the core running experience.
What to expect
- Easy mobile sign-up process.
- Streamlined packet and bib pickup on race day.
Standout details
- 50K trail race
- Mountainous terrain
- Mobile sign-up
- Race day bib pickup
Auto-drafted from the public listing — confirm details on the official event page before signing up.
Distances & registration
4 optionsRegistration for all distances is through the official signup link above.
- 13K
Sat, Feb 20, 8:45 AM EST · From $43.40
Opens Feb 18, 2026, 7:00 PM EST · Closes Oct 31, 2026, 5:00 AM EDT
- 13.4 Miles
Sat, Feb 20, 8:30 AM EST · From $54.00
Opens Feb 18, 2026, 7:00 PM EST · Closes Oct 31, 2026, 5:00 AM EDT
- 35K
Sat, Feb 20, 8:15 AM EST · From $64.60
Opens Feb 18, 2026, 7:00 PM EST · Closes Oct 31, 2026, 5:00 AM EDT
+ 1 more optionHide
- 50K
Sat, Feb 20, 8:00 AM EST · From $85.80
Opens Feb 18, 2026, 7:00 PM EST · Closes Oct 31, 2026, 5:00 AM EDT
Vibe Check
Serious Test
Serious TestTrail + hills, longer distance
- Mostly trail
Based on terrain, weather, and distance data.
The course
- Trail
- Hilly
From the organizer
Use this page to sign up for FOURmidable trail race starting Feb 20, 2026 up until the start of the race. Simply sign up using your smart phone and the system will automatically add you to the packet pick up roster. After signing up, line up to pick up your bib in the correct line.
Also in this area
Easier options nearby
Lower-difficulty races in the same state.