Western States Endurance Run

Western States Endurance Run
Name	Western States Endurance Run
Caption	A section of the historic Western States Trail.
Date	Typically the last weekend of June
Location	Sierra Nevada, California, U.S.
Type	Ultramarathon
Distance	100.2 miles (161.3 km)
Established	1974 (first organized run); 1977 (first official race)
Record	Men: 14:09:28 – Jim Walmsley (2023), Women: 16:47:19 – Courtney Dauwalter (2024)
Sponsor	Montrail / Columbia Sportswear
Website	https://www.wser.org/

Western States Endurance Run. It is an annual 100.2-mile (161.3 km) ultramarathon that traverses the Sierra Nevada mountains in California. The point-to-point race starts in Olympic Valley, near the site of the 1960 Winter Olympics, and finishes at the Placer High School track in Auburn. Recognized as one of the world's oldest and most prestigious ultramarathon events, it is renowned for its challenging terrain, high altitude, and extreme summer temperatures.

History

The event originated in 1955 when Wendell T. Robie and a group of riders completed the Tevis Cup, a 100-mile horseback ride along the Western States Trail. The idea for a footrace was proposed in 1972 by Gordy Ainsleigh, who, after his horse was injured, completed the course on foot to prove it was possible. The first organized run occurred in 1974, and the first official race, with a field of 14 runners, was held in 1977 under the direction of the Western States Endurance Run Foundation. Key figures in its early governance included Mo Livermore and Dr. Bob Lind. The race gained significant prominence after being featured in the 1994 book Born to Run by Christopher McDougall.

Course

The course follows the historic Western States Trail, beginning at the Squaw Valley ski resort at an elevation of 6,200 feet. Runners immediately face a climb to Emigrant Pass at 8,750 feet within the first 4.5 miles. The route passes through iconic checkpoints like Red Star Ridge, Duncan Canyon, and Robinson Flat. It descends into the deep canyons of Deadwood Canyon and El Dorado Canyon, before crossing the Middle Fork American River at Rucky Chucky. The final miles include a climb from No Hands Bridge before the finish in Auburn. The course features a cumulative elevation gain of approximately 18,000 feet and a loss of about 23,000 feet.

Qualification and entry

Gaining entry is highly competitive due to the race's limited field. Prospective runners must first complete a qualifying race of 100 kilometers or 100 miles that is sanctioned by the organization. Qualifying times must be achieved within a specified calendar window. All eligible runners then enter a weighted lottery system, where additional tickets are awarded for consecutive years of unsuccessful entry. A small number of automatic entries are granted to winners of selected events like the Montane Spine Race and the Ultra-Trail du Mont-Blanc, as well as through the race's own Golden Ticket series.

Race day and logistics

The race begins at 5:00 AM PST on the last Saturday in June. Runners must contend with high temperatures, often exceeding 100°F (38°C) in the canyons. A vast support network includes over 1,500 volunteers staffing 21 aid stations, which provide food, water, medical checks, and drop bags. Key medical checks occur at Michigan Bluff and Foresthill. A strict series of cut-off times is enforced along the course, with the final 30-hour cutoff at the finish line. Pacers are permitted to join runners after the Foresthill aid station at mile 62.

Records and notable performances

The men's course record of 14:09:28 is held by Jim Walmsley, set in 2023. Courtney Dauwalter set the women's record of 16:47:19 in 2024. Ann Trason won the women's race a record 14 times between 1989 and 2003. Other notable champions include Tim Twietmeyer, who won five times, and Scott Jurek, who set a then-course record in 2004 and won seven consecutive titles from 1999 to 2005. In 2022, Kilian Jornet won in his debut. The oldest finisher is Gunhild Swanson, who completed the race at age 70.

Impact and legacy

The event is considered a founding race of modern ultramarathon culture in the United States and a model for subsequent 100-mile races worldwide. It established rigorous standards for medical oversight, environmental stewardship, and volunteer organization in the sport. The race's lottery and qualification system has been widely emulated. Its history and challenge have been documented in numerous films and books, solidifying its iconic status. The race also partners with the Western States Trail Foundation to help maintain the historic trail system used by the Tevis Cup.

Category:Ultramarathons in the United States Category:Sports in Placer County, California Category:Recurring sporting events established in 1977 Category:June sporting events