Rio Del Lago 100 Mile Endurance Run
Always double-check with the organizer's website! This page may contain affiliate links.
Rio Del Lago 100 Mile Endurance Run: 2026
Rio Del Lago offers two race distances:
- 100 mile
- 50K
Both races take place on Saturday, November 7, 2026, at Beal's Point in Folsom Lake State Recreation Area in the Sierra Foothills, about 40 minutes east of Sacramento.
The 100 mile course lists approximately +13,458 ft and -13,458 ft of elevation change. The 50K course lists approximately +2,542 ft and -2,526 ft of elevation change. The route uses a mix of single-track trails, paved bike paths, oak woodland, meadows, bridges, creeks and switchbacks. Key course features and landmarks include Hazel Bluff, Middleridge Trail, Shadow Glen Stable, Black Miners Bar, Rainbow Bridge, Old Historic Folsom streets, the American River Parkway, Nimbus Bluffs, Granite Beach, Twin Rocks, Horseshoe Bar, Rattlesnake Bar, Cardiac Hill, Auburn Dam Overlook, the Western States Trail and No Hands Bridge.
Aid stations are fully stocked with assorted energy gels, water, Skratch Hydration sports drink, Coke, ginger ale, Red Bull, boiled potatoes, PB&J, JAMBARS and other sweet and salty foods. Night time aid stations offer hot veggie broth and quesadillas. Soup and hot food are available at Horseshoe Bar, Rattlesnake Bar, the Overlook, No Hands Bridge, Auburn Lake Trails, Cool and Granite Beach on the return. The event is cupless and runners must carry two water bottles or a hydration pack.
100 mile runners receive three issued on-course drop bags for specified aid stations and additional start and finish bag options. Pacers may join only at designated locations, must be on foot and at least 18 years old, and may not provide mechanical aid. Trekking poles are allowed for the 100 mile from the Auburn Dam Overlook to the finish. There are four medical stations on course staffed by EMTs, paramedics and medical personnel. Entry fees are non-refundable and non-transferable. Participants receive aid station support, a technical shirt, finisher medallion, a goodie bag and post-race food; finishers under the stated time receive a jacket and belt buckle. Visit the organization's website for the most recent information.
