Trail landscape for Western States 100

Western States 100

100 miles·15,453 ft gain·Olympic Valley, California
Ultra100 MileCanyonHistoricLottery Entry

Photo by Shakti Rajpurohit on Unsplash

Distance100 miles
Gain15,453 ft
DateJun 28, 2026
StatusClosed
Fee$435
Difficulty5/5

Registration is closed for Western States 100

Get alerted if spots open up or when next year's registration goes live.

About This Race

The original 100-mile trail race and still the standard by which all others are measured. A point-to-point journey from Squaw Valley to Auburn through the canyons of California's Sierra Nevada, with 18,000 feet of climbing and temperatures that can exceed 100°F in the river gorges.

The course begins at the base of Palisades Tahoe (formerly Squaw Valley) with an immediate 2,500-foot climb to Emigrant Pass at 8,750 feet — the highest point on the course and a rude awakening at mile 4. From there, the route follows the Western States Trail through the granite high country before beginning a long, relentless descent into the American River canyons. By the time you reach the river crossings at Rucky Chucky (mile 78), you’ve dropped nearly 7,000 feet from the high point. The final 22 miles from the river to the Placer High School track in Auburn are a mix of exposed canyon trail and rolling singletrack, often run in the dark and in searing heat that radiates off the canyon walls. The course rewards patient runners who respect the heat and manage their effort through the long middle miles. The canyons are beautiful and unforgiving in equal measure.

Elevation Profile

The course gains 15,453 ft over 100 miles, with the steepest section between mile 1–mile 2.

Course Map

Route shown is approximate and for illustration purposes.

Aid Stations

6 stations along the course

Lyon Ridge

Mile 10.5·6,801 ft

water, electrolyte, gels, fruit

Red Star Ridge

Mile 16.0·6,004 ft

water, electrolyte, gels, fruit, soup

Robinson Flat

Mile 30.0·6,601 ft
Crew AccessDrop Bags

full aid, medical, weigh-in

10h 30m cutoff

Major crew access point. Weigh-in station.

Foresthill

Mile 62.5·3,297 ft
Crew AccessDrop Bags

full aid, medical, weigh-in, ice

20h 30m cutoff

The big crew access point. Many pacers start here.

Rucky Chucky (river crossing)

Mile 78.0·1,296 ft

water, safety boats

24h 30m cutoff

Waist-deep river crossing. Safety boats on standby.

Highway 49

Mile 94.0·1,214 ft
Crew Access

water, electrolyte, ice, fruit

28h 30m cutoff

Last crew point before the finish.

Race History

80%
Finish Rate

2024 Results

369

Starters

296

Finishers

14h 48m

Winning Time

24h

Median Time

Practical Info

Weather

Hot. Expect 90–105°F in the canyons, cooler at altitude. Snow is possible at the start. Dramatic temperature swings from high country to canyon floor.

Nearest Airport

Sacramento (SMF)

Accommodation

Olympic Valley has resort lodging. Auburn has standard hotels. Many runners camp or stay in Airbnbs in the area. Book early — the race weekend draws a large crowd.

Required Gear
  • headlamp
  • reflective vest
  • 10oz minimum fluid capacity

Best For

experienced ultrarunnersheat-adapted runnersthose seeking the original 100-mile experience

Notable Features

River crossing at Rucky Chucky, Placer High School track finish, lottery entry system with escalating odds