Rio Del Lago 100 Mile Endurance Run

Date: November 01, 2025

Location: Granite Bay, California, United States

Distances: 50K, 100M

Description: The Rio Del Lago 100 Mile Endurance Run is a classic ultra event in the Sierra Foothills, following the American River and Folsom Lake trails with rolling terrain and scenic views. It offers both 100-mile and 50K options, known for its supportive aid stations and night running challenges. This race is a popular Western States qualifier and attracts experienced ultrarunners.

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