Rio Del Lago 100 Mile Endurance Run
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Rio Del Lago 100 Mile Endurance Run
Rio Del Lago takes place on Saturday, November 7, 2026 at Beal's Point in the Sierra foothills near Folsom Lake, about 40 minutes east of Sacramento. The event includes two supported trail distances and serves as a qualifier for the 2027 Western States 100.
- 100 Mile Endurance Run
- 50K Endurance Run
The 100-mile course features varied terrain including oak woodlands and meadows, single-track trails, creeks, bridges and switchbacks. Notable route features include Hazel Bluff, Middleridge Trail, Pioneer Express Trail, the American River Parkway and Nimbus Bluffs, No Hands Bridge, Auburn Lake Trails, Granite Beach and Twin Rocks. Elevation change for the 100 mile course is approximately +13,458 ft and -13,458 ft. The 50K course has approximately +2,542 ft and -2,526 ft of elevation change.
Aid stations are regularly stocked with water, sports drink, energy gels, soda and a range of sweet and salty foods; PB&J and JAMBARS are available at aid stations. Night stations offer hot veggie broth and quesadillas. Runners must carry two water bottles and/or a hydration pack and note that the event is cupless; reusable cups are not provided. Pacers are permitted only at designated locations, must be on foot and follow event pacer rules. Crewing is restricted at specific on-course locations and violations can result in disqualification. Official finishers under 30 hours receive a finisher's jacket and belt buckle. Visit the organization's website for the most recent information.
