Rio Del Lago 100 Mile Endurance Run
Granite Bay, United States • 1 Nov 2025
Event overview
Rio Del Lago is a trail running event at Beal's Point, Folsom Lake State Recreation Area in the Sierra foothills, about 40 minutes east of Sacramento. The 2025 event includes both a 100 mile endurance run and a 50K endurance run on Saturday, November 1, 2025. The 100 mile race is a qualifier for the 2026 Western States 100. Entry fees are non-refundable and non-transferable.
- 100 mile
- 50K
Course and race support
The 100 mile course begins with a 0.6 mile warm-up loop around Beal's Point and follows trails and paved bike paths through the American River Parkway, Johnny Cash Trail, Nimbus Bluffs, Middleridge, Granite Beach, Twin Rocks, Horseshoe Bar, Rattlesnake Bar, Auburn Lake Trails and the Western States Trail, including the No Hands Bridge and Auburn Dam Overlook. Total elevation gain and loss is approximately +13,874 ft / -13,874 ft. Terrain includes oak woodland, meadows, single-track, switchbacks, bridges and some paved sections.
Aid stations are fully stocked with items such as GU gels, Skratch Hydration, cola, ginger ale, Red Bull, boiled potatoes, PB&J and JAMBAR products. Night stations will offer hot soup and quesadillas at several locations. The race is cupless - runners must carry two water bottles or a hydration pack. Runners receive issued on-course drop bags for Rattlesnake, Overlook and Auburn Lake Trails; unclaimed drop bags are donated after the event. Pacers are allowed at designated locations and must be on foot and 18 years or older. Visit the organization's website for the most recent information.