The Rubicon
Foresthill, United States • 25 Oct 2025
Event overview
The Rubicon is described as a very difficult and remote on- and off-trail foot race in the backcountry of the northwestern Sierra Nevada. The event location is Oxbow Reservoir, CA, near Blacksmith Flat Spur (FS Rd 23-002). It is not an official event; it is presented as a "fatass", a group run without formal race support. There will be no course markings, no aid stations, no event staff, and no medical team. Updates are posted to a Facebook group.
Registration closes Thu, Oct 23 at 11:59 PM PT. The event date is Oct 25, 2025.
Routes and rules
Available route options are:
- The Requisite: 15+ miles, ≈6,700 ft gain, 3 climbs, 2 water crossings
- The Resonant: 30+ miles, ≈12,700 ft gain, 6 climbs, 6 water crossings
- The Revenant: 43+ miles, ≈19,300 ft gain, 8 climbs, 8 water crossings
Progression requirements are stated: completion of The Requisite is required before attempting The Resonant in a later year, and completion of The Resonant is required before attempting The Revenant. The route is remote and partly unmarked, and participants should plan for backcountry conditions and self-support. Visit the organization's website for the most recent information.