American River Endurance Run

Folsom, United States • 4 Apr 2026

Event overview

The American River Endurance Runs are a set of trail races that finish in Auburn and use the City of Folsom as the start and hospitality host. The event includes a 50-mile ultramarathon that follows the American River Parkway from Folsom to Auburn, plus shorter races that also finish in Auburn. The race website lists sponsors including Altra, GU Energy, Skratch Labs and others. Packet pickup is available at Fleet Feet Folsom in the days before the race.

Race details

Distances:

  • 50 miles
  • 25 miles
  • 10 miles

Entry for each race includes a NorCalUltras goody bag, a technical race shirt (size not guaranteed for late registrants), on-course GU gels and Skratch hydration, professional timing and results, a handcrafted finisher medallion for all finishers, and food and beverage options at the post-race area. AR50 finishers receive a special finisher pullover hoody. The organizer states that all entry fees are non-refundable and entries are non-transferable; an optional enhanced refund protection program through Race Roster and Protecht is available for an additional fee. The event is staged by NorCalUltras with support from volunteers and local partners. Visit the organization's website for the most recent information.

Race information

50 mi
American River 50 Mile Endurance Run
25 mi
American River 25 Mile Run
10 mi
American River 10 Mile Run
Visit the organization's website for the most recent information.
Trail runs nearby

Mile Madness returns Oct 10 to 13, 2025 at Sunset Whitney Recreation Area in Rocklin CA, with 6, 12, 24, 48 and 72 hour events plus a 100 mile plus challenge on a fast 1.07 mile loop. Join a spirited community chasing buckles and big person..

Event overview Granite Head Trails & Ales is a trail running event on Saturday, October 11, 2025, in Granite Bay, California. Both race courses start and finish at Granite Beach. The event is presented by Altra and the local contact is..

Vampire Run - Unite for Bleeding Disorders is held in Roseville, CA, at Vernon Street Town Square in Downtown Roseville. It features a first-ever 5K on the Roseville trails, offered as a timed run with adult 5K and child 5K (under 14) and a..

Run through history at the California Gold Rush Trail Run in Coloma's Marshall Gold Discovery State Historic Park, with distances from a kids run to a half marathon on scenic singletrack. Medals for 5K and up and race day sign up.

Event overview The 16th annual Willow Hills XC Open is scheduled for Saturday, October 18, 2025. The event is part of the Pacific Association USATF Cross Country Grand Prix. Races are held at Willow Hill Reservoir Community Park next to Fol..

Run scenic Sierra Foothills trails in Cool California with 5k, 10k and trail half marathon options for every pace. Register by September 30 for a HoC cotton t shirt, support youth programs and enjoy a post race pancake breakfast.