26–27 Jun 2027 · Olympic Valley, United States

Western States 100

Western States® 100-Mile Endurance Run

About the event

The world's oldest 100-mile trail race, according to the organisers, held since 1974. It starts in Olympic Valley, near the site of the 1960 Winter Olympics, and finishes 100.2 miles later at Placer High School in Auburn, California, with more than 18,000 ft of climbing and nearly 23,000 ft of descent. Entry is by lottery.

When: 26–27 Jun 2027
Where: Olympic Valley, United States
Olympic Valley to Placer High School, Auburn
Category: Trail and mountain running
Type: Race / competition
Open to: Athletes and participants
Held: Every year
Organiser: Western States Endurance Run
Website: wser.org ↗
Source: Official website · checked on 25/10/2026