Dirty Secret Trail Run 2025
- Trail Run
- 9 km
- 17 km
Auburn, California, United States
FOURmidable
- Trail Run
- 50 km
- 36 km
- Half Marathon
- 13 km
298 Pacific ave, Auburn, CA, United States
About the Event
FOURmidable 2026 Information
This rugged race will take you through breathtaking beauty, offering a true test of endurance and a chance to experience nature at its finest.
Prize Money
For our 2026 edition, Singletrack Running will match 100% of all donations received from the community. During your registration, you can donate a few dollars towards the prize money. STR will match this amount up to $3,000, divided evenly between genders with allocations for 1st, 2nd, and 3rd place finishers.
Course Record Award
An additional $500 will be awarded to the first runner breaking the current course record in each gender:
- Male: Jonathan Aziz - 3:29:31hrs (2023)
- Female: Kimber Mattox - 4:06:58 (2023)
Start Times
- 50K: 8:00 AM
- 35.5K: 8:15 AM
- 1/2 Marathon: 8:30 AM
- 13K: 8:45 AM
Registration Fees
- 50K - $98.12 ($125.97 after Nov 30)
- 35.5K - $82.18 ($103.43 after Nov 30)
- 1/2 Marathon - $71.56 ($87.50 after Nov 30)
- 13K - $50.31 ($60.93 after Nov 30)
All prices include taxes and fees.
How to get there
Courses
Tickets
Apuama does not sell tickets. Check prices and availability on the event's website.
| 50K Registration | $98.12 | See |
| 35.5K Registration | $82.18 | See |
| 1/2 Marathon Registration | $71.56 | See |
| 13K Registration | $50.31 | See |
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