Official event page for 2026 Western States 100-Mile Endurance Run, an amateur-enterable individual trail/mountain/ultra running event in Olympic Valley to Auburn, California, United States. Importance evidence: Official WSER site has 2026 Entrants/Participant Guide/entry process pages; iconic original 100-mile trail endurance run with lottery/qualifying entry.
Date
27 juin 2026
Distance
—
Elevation
—
Difficulty
n/a