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  • Distance: 6 km
    Blacksmith Flat Spur Fs Rd 23-002, Oxbow Reservoir, California, United States
    OpenStreetMap Google Maps
    Sat, Oct 24, 2026 at 7:15 AM

    About Rubicon noun A limit that when passed or exceeded permits of no return.The Rubicon is a very difficult and remote on and off-trail foot race in the backcountry of the northwestern Sierra Nevada, and its undertaking should not be taken lightly. Make no mistake - this endeavor will test your limits!Disclaimer: This is not an official event. This is a fatass; a glorified group run. There will be no course markings, no aid stations, no staff, and no medical team.The route options are as follows:The Requisite: 15+ miles, ≈6,700 ft of gain, 3 hill climbs, & 2 water crossingsThe Resonant: 30+ miles, ≈12,700 ft of gain, 6 hill climbs, & 6 water crossingsThe Revenant: 43+ miles, ≈19,300 ft of gain, 8 hill climbs, & 8 water crossingsYou must first complete The Requisite in order to be eligible for an attempt of The Resonant in the future.You must first complete The Resonant in order to be eligible for an attempt of The Revenant in the future.More info can be found here.For updates, please join

    the Facebook group.Scheduling: The Rubicon will fall on the 4th Saturday of October when there are 5 Saturdays in the month. When there are 4, it will move to the 1st Saturday to avoid conflict with Hilloween. Event's current local time: 1:55 AM PT

    RunTrailUltra
  • Distance: 14.6 km
    Sat, Oct 10, 2026 at 6:00 AM

    Overview

    Email the RD at [email protected] to get on the waiting list, everybody who has ever been on the waiting list has gotten in25 and 50 mile fatass style run along the wild and Scenic North Fork of the American River. Expect roughly 10,000' of climbing for the 25 mile and 20,000' for the 50, with a good amount of bushwhacking and route finding thrown in for good measure. Free to enter, but the rule is that you have to wait at the finish for at least one runner to come in.The forest service has confirmed that we don't need a permit as long as we keep it small, so registration for both distances combined will be limited to 50 people. Since portions are off trail, I'm not going to post the map until the week before the event, but it will start and finish at the Shirttail Creek Campground near Foresthill, CA and go up and down out of the canyon using Euchre Bar, Pioneer Mine, Ebeneezer's highway, Green Valley, Mumford Bar, and Italian Bar. There will be one location for drop bags and crew to meet you that you will pass through twice.Don't kid yourself, this is a hard, hard run. Last year's finishers took 14 hours for the 25, and 25 hours for the 50. Distances are approximate, and may refer to nautical miles.Ultrasignup is gracious enough to host fatass events for no cost, but unfortunately the waitlist does not set up for free events. If the event is full, email the RD to get on the waitlist. Everybody who has ever been on the waitlist has gotten in. We have a group campsite for Friday and Saturday night.

    Event's current local time: 1:44 AM PT

    RunTrailUltra