Fourmidable

FEB
20
2027
Trail races near Auburn, CA offering 50K, 35K, half marathon and 13K on mostly singletrack; the 50K includes over 6000 feet of climbing and the event is cupless.
Sat 20 Feb 2027
50 kilometers 35 kilometers 13 miles 13 kilometers

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FOURmidable

FOURmidable is a trail running event held at Overlook Park in Auburn, California on February 13, 2027. It offers multiple distances on predominantly singletrack terrain with less than one mile of road on any course.

Distances:

  • 50K
  • 35K
  • Half marathon
  • 13K

The 50K course accumulates over 6000 feet of climbing and routes include four named hills: Cardiac Hill, K2 (Training Hill), Knickerbocker (Old Auburn Dam Site), and Overlook Hill. Aid stations are positioned along the courses and may provide soda, boiled potatoes, candy, gels, electrolyte supplements, salt tablets, and other items appropriate to the distance.

The event is cupless; each participant must bring a reusable cup or water bottle. Small collapsible water containers are available for purchase at the event. Race packets and race swag, including custom bibs, are available for early pickup at the start/finish area the day before the event from 3 PM to 6 PM, or on race morning starting one hour before each race.

Overnight vehicle and trailer camping is allowed at the start/finish area the night before the event; tents are not permitted but roof-top tents are allowed. Porta potties will be on site and campfires are prohibited. Main parking at Auburn Overlook Park is reserved for registered participants; additional parking is available on Pacific Avenue and at a paid staging area. Visit the organization's website for the most recent information.

50 km
50k
35 km
35k
13 mi
Half Marathon
13 km
13k

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