The Rubicon

OCT
25
2025
Remote, rugged and self supported, The Rubicon is a challenging on and off trail group run in the northwestern Sierra Nevada near Oxbow Reservoir. Choose progressive routes into long distances with huge climbing and river crossings and expect no markings, aid or staff.
Sat 25 Oct 2025
43 miles 30 miles 15 miles

Always double-check with the organizer's website! This page may contain affiliate links.

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.

43 mi
The Revenant (43+ Miles)
30 mi
The Resonant (30+ Miles)
15 mi
The Requisite (15+ Miles)

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