The Rubicon

OCT
24
2026
Remote, self supported on and off trail foot event at Oxbow Reservoir with three escalating routes from about 15 to 43 miles.
Sat 24 Oct 2026
43 kilometers 30 kilometers 15 kilometers

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The Rubicon

The Rubicon is a very difficult and remote on and off trail foot race in the backcountry of the northwestern Sierra Nevada near Oxbow Reservoir, CA. The event is organized by Skybreaker Racing and is presented as an informal group run rather than an official race. There are no course markings, no aid stations, no event staff, and no medical team.

Three route options are offered:

  • The Requisite: 15+ miles, ≈6,700 ft gain, 3 hill climbs, 2 water crossings
  • The Resonant: 30+ miles, ≈12,700 ft gain, 6 hill climbs, 6 water crossings
  • The Revenant: 43+ miles, ≈19,300 ft gain, 8 hill climbs, 8 water crossings

Completion requirements apply: participants must first complete The Requisite to be eligible to attempt The Resonant in the future, and must complete The Resonant before attempting The Revenant.

Scheduling for The Rubicon follows a seasonal rule: when October has five Saturdays the event falls on the fourth Saturday; when October has four Saturdays it moves to the first Saturday to avoid conflict with Hilloween. Registration closes on October 22 at 11:59 PM PT for the listed occurrence. Visit the organization's website for the most recent information.

43 km
The Revenant
30 km
The Resonant
15 km
The Requisite
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