Western States 100 Mile Endurance Run

This event meets ATRA's Event Standards.

ATRA race member


Jun 26, 2021 at 5:00 AM

Western States 100 Mile Endurance Run

Squaw Valley CA,


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Entry Fee $295
(Lowest or Early Registration)

Prize Money: yes


  • 100M

Type: Ultra

Participant Limit: 375

Starting Elevation: 6200

High Point: 8750

Percent of the course on un-paved trails: 95%

First Year of the Event: 1974

Men's Record: 2019 Jim Walmsley (29) 14:09:28

Masters Men Record: 2013 Mike Morton 15:45:21

Women's Record: 2012 Ellie Greenwood (16:47:19)

Masters Women Record: 2002 Ann Trason (18:16:26)


Starting in Squaw Valley, California near the site of the 1960 Winter Olympics and ending 100.2 miles later in Auburn, California, Western States, in the decades since its inception in 1974, has come to represent one of the ultimate endurance tests in the world. Following the historic Western States Trail, runners climb more than 18,000 feet and descend nearly 23,000 feet before they reach the finish line at Placer High School in Auburn. In the miles between Squaw Valley and Auburn, runners experience the majestic high country beauty of Emigrant Pass and the Granite Chief Wilderness, the crucible of the canyons of the California gold country, a memorable crossing of the ice-cold waters of the main stem of the Middle Fork of the American River, and, during the latter stages, the historic reddish-brown-colored trails that led gold-seeking prospectors and homesteading pilgrims alike to the welcoming arms of Auburn.

Explore the entire Western States course with Google Street-view – a project of the American Trail Running Association:

Our expedition took place the week before the 2016 Western States 100 Mile Endurance Run on June 25. Led by our Director of Online Marketing, Richard Bolt, and supported by several prominent ATRA corporate members, the expedition was documented by iRunFar, Scott Yates and experienced trail running race photographer Mike Hermsmeyer. Read iRunFar’s Perspectives From the Western States Trekker Project to get a behind the scenes look into the expedition.



Event Dates

Held on Jun 26, 2021

Held on Jun 27, 2020

Held on Jun 29, 2019

Held on Jun 23, 2018

Held on Jun 24, 2017

Held on Jun 25, 2016

Held on Jun 27, 2015

Held on Jun 28, 2014

Held on Jun 29, 2013

Held on Jun 23, 2012

Held on Jun 25, 2011

Held on Jun 26, 2010

Held on Jun 27, 2009

Held on Jun 23, 2007

Held on Jun 24, 2006

Held on Jun 25, 2005

Held on Jun 26, 2004

Held on Jun 28, 2003

Held on Jun 29, 2002

Held on Jun 23, 2001

Held on Jun 24, 2000

Held on Jun 26, 1999

Held on Jun 27, 1998