Rio Del Lago 100 Mile + 50K Endurance Runs

Rio Del Lago 100 Mile + 50K Endurance Runs

The Jewel of the Sierra Nevada

November 7-8, 2026

Celebrating 25 Years of the Rio 100 Mile Endurance Run and 5 Years of the Rio 50K Endurance Run.

About the Races:

• Rio 100 Mile Endurance Run: A challenging course from Folsom to Auburn and back, featuring rolling singletrack and rugged Sierra foothills beauty.
• Rio 50K Endurance Run: Follows the scenic early miles of the 100-mile course along Folsom Lake, Lake Natoma, and the Johnny Cash Trail.

A Milestone Year — A Legendary Experience: Expect an unforgettable weekend filled with tradition, camaraderie, and celebration, with world-class race organization, well-stocked aid stations, and incredible volunteers.

All Entries Include:

• NorCalUltras Goody Swag Bag
• Commemorative 25th Anniversary Technical Race Shirt
• Finisher Medallion
• 100 Mile Finisher Belt Buckle (sub-30-hour finishers)
• 100 Mile Finisher Athleisure Lightweight Pullover
• GU Energy Gels on Course
• Skratch Hydration on Course
• B-Tag Chip Timing
• Bob and Brandt's Breakfast Bistro
• Chef Tim’s “Soup for the Soul”
• Dust Bowl Beer Garden

Visit the official website for detailed race information, course maps, and lodging options in Folsom, California.