The Rubicon

The Rubicon

The Rubicon is a backcountry foot race at Oxbow Reservoir, CA on October 24, 2026, organized by Skybreaker Racing. It is described as a very difficult and remote on and off trail event in the northwestern Sierra Nevada.

This is not an official race. The organizer describes the event as a fatass, a group run without course markings, aid stations, event staff, or a medical team. Participants should be prepared for self navigation and self support.

Route options:

• 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 are stated for progression: completion of The Requisite is required before attempting The Resonant, and completion of The Resonant is required before attempting The Revenant.

The event is scheduled to fall on the fourth Saturday of October when that month has five Saturdays and moves to the first Saturday when there are four Saturdays. Registration closes October 22. Visit the organization's website for the most recent information.

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