Rio Del Lago 100 Mile Endurance Run
Granite Bay, United States • 1 Nov 2025
Event details
Rio Del Lago 2025 is a trail running event held on November 1, 2025, starting and finishing at Beal's Point in Folsom Lake State Recreation Area, in the Sierra foothills about 40 minutes east of Sacramento. The event includes the following distances:
- 100 miles
- 50K
The 2025 100-mile race is a qualifier for the 2026 Western States 100. Entry fees are non-refundable and non-transferable. Packet pickup is the day before the race at Fleet Feet in Folsom. The event uses chip timing and issues finisher awards and items for finishers under the event cutoffs.
Course and logistics
The 100-mile course is an out-and-back loop from Beal's Point to Auburn and back. Total elevation change is approximately +13,874 ft / -13,874 ft. The route combines paved bike paths, single-track trails, oak woodland and meadows, bridges and creek crossings, and sections that join the American River Parkway and parts of the Way Too Cool 50K course.
Aid stations are fully stocked with water, sports drink, energy gels, soda, boiled potatoes, PB&J and energy bars; night-time stations provide hot broth and quesadillas at selected locations. The race is cupless - runners must bring their own cup and must carry two water bottles or a hydration pack. Three issued drop bags are provided for on-course locations, and pacers may join runners only at specified locations (Overlook outbound mile 45.22, Cool Fire Station mile 69.13 inbound, Overlook inbound mile 76.83, and Rattlesnake Bar mile 86.01) and must be on foot. Visit the organization's website for the most recent information.