Western States Endurance Run

JUN

27

2026

Western States 100 is an iconic 100 mile endurance run from Olympic Valley to Auburn, California, tracing remote, rugged Sierra trails. Expect big climbs, sweeping descents and a true test of stamina and grit in a classic ultramarathon.

Sat 27 Jun 2026

Olympic Valley, California

Website Registration

100 miles

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Western States 100 : June 27, 2026

The Western States 100 is a 100-mile endurance run that begins in Olympic Valley, California, and finishes in Auburn, California. The course follows the trans-Sierra portion of the Western States Trail, a nationally dedicated route that stretches from Salt Lake City, Utah to Sacramento, California. The route starts at about 6,200 feet in Olympic Valley and climbs to Emigrant Pass at 8,750 feet, a rise of 2,550 vertical feet in the first four miles. After Emigrant Pass the course gains about 15,540 feet and descends about 22,970 feet before reaching Auburn. Much of the trail passes through remote and rugged territory.

Entry and location

The event location is listed as 1960 Olympic Valley Road, Olympic Valley, CA. The 2026 race lottery is open from November 1 through November 21 via the event portal. The lottery drawing is scheduled for December 6, 2025. Those selected in the lottery and automatic entrants will receive an invitation to register on UltraSignup. The race website is wser.org. Visit the organization's website for the most recent information.

100 mi

100 Mile