2026 FOURmidable
The FOURmidable Trail Races 2026 will take place on Saturday, February 21, 2026, in Auburn, California, with the start and finish at Overlook Park, located at 855 Pacific Ave. The event is set in the Sierra Nevada foothills, offering runners a rugged running experience through singletrack and fire roads. On race day, participants can expect partly cloudy conditions with a high of around 50°F and a low of 34°F, with minimal precipitation expected. The course features technical trails, significant elevation changes, and scenic views, providing a challenging and immersive trail running experience.
What distances are available for this event?
- →50K race starting at 8:00 AM
- →35K race starting at 8:15 AM
- →Half Marathon+ (~21K) race starting at 8:30 AM
- →13K race starting at 9:00 AM
What is the course like?
The course includes rugged singletrack and fire roads through the Sierra Nevada foothills, with less than one mile of pavement across all distances. The 50K features over 6,000 feet of cumulative elevation gain across four signature climbs: Cardiac Hill, K2 (Training Hill), Knickerbocker (near the Old Auburn Dam Site), and Overlook Hill. Shorter distances follow modified versions of the same trail network, maintaining the event's trail character.
What is included in the race registration?
Participants receive custom race swag and bibs. Aid stations are fully stocked with electrolytes, gels, boiled potatoes, candy, and more. The event is cupless, requiring runners to carry their own reusable cup or bottle.
What are the race start times?
- →50K: 8:00 AM
- →35K: 8:15 AM
- →Half Marathon+: 8:30 AM
- →13K: 9:00 AM
Are there awards or prizes for the 50K?
Yes, the 50K has a community-supported prize purse. Runners may donate toward the prize fund during registration, with Singletrack Running (STR) matching 100% of donations up to $3,000. The total purse is determined by race day based on donations. The prize distribution is split 50/50 between male and female divisions, with 50% to 1st place, 30% to 2nd, and 20% to 3rd. Additionally, an extra $500 is awarded to the first runner of each gender who breaks the existing course record: Male (3:29:31 by Jonathan Aziz, 2023) and Female (4:06:58 by Kimber Mattox, 2023).
What are the event facilities and amenities?
Overnight vehicle and trailer camping is permitted at Overlook Park on Friday, February 20. No tents are allowed, but rooftop tents are permitted. Early packet pickup is available on Friday from 3:00–6:00 PM at Overlook Park, with race morning pickup available one hour before each start time.
What is the weather forecast for the race day?
On February 21, 2026, the weather in Auburn is expected to be partly cloudy with a high of approximately 50°F and a low of 34°F. There is minimal precipitation expected, and the conditions are generally favorable for trail running. Runners should prepare for variable temperatures and potentially changing weather conditions throughout the day.