Ultra Marathons
Western States 100
About this race
The original 100-miler: Squaw Valley to Auburn across the Sierra high country and canyons.
Before you line up
Race-day planning
Western States 100 is held on Saturday, June 26, 2027 in Olympic Valley, CA. Racing begins at 05:00 AM. Registration is currently open — use the official registration link above to enter directly with the organizer.
Always confirm the date, start time, entry fee and course details on the official event site before you travel or register, as race information can change after a listing is published. For discipline-specific guidance on what to expect and how to prepare, see the Ultra Marathons sector guide.
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