BestRaces| Distances | 100-miler |
| Surface | trail |
| Field size | 322 runners |
| Founded | 1974 (52 years) |
| Elevation gain | 18,000 ft |
| USATF certified | N/A (trail) |
| Boston qualifier | No |
Researched from the race's own site and published results, last updated October 4, 2026.
Running Western States 100 for a cause? Set up a free team page — rally your people, point donations straight to your charity.
Where it runs
The course for Western States 100, drawn from the route its organizer or the public map record provides.
Loading the map…
Course lines are simplified for the web — run the official route, not this one.
Race-day weather
What the weather did on or around June 26 in each of the last 5 years, measured at Squaw Valley G.C., 1.3 miles from Olympic Valley.
| Year | High | Low | Rain |
|---|---|---|---|
| 2026 | 52°F | 43°F | none |
| 2025 | 63°F | 51°F | none |
| 2024 | 64°F | 51°F | none |
| 2023 | 55°F | 40°F | none |
| 2022 | 72°F | 55°F | none |
Daily highs and lows, not start-line temperatures: most races start in the cool of the morning, closer to the low. Source: NOAA National Centers for Environmental Information, GHCN-Daily.
Stay near Olympic Valley
Hotels and rentals in and around Olympic Valley, CA.
Bookings made through this map may earn BestRaces a commission. It has no effect on rankings (how ranking works).
Race Pace Analyzer beta
Build your Western States 100 splits
This one already knows the course. Give it your goal time and it gives you every split to the finish, adjusted for this race's terrain and its usual race-morning temperature, plus a fueling plan and a check on whether the goal fits your fitness. It's free, and there's nothing to sign up for.
- Already loaded
- 100 miles
- 18,000 ft of climbing · Mountain
- Trail underfoot
- ≈60°F on June race mornings
| Mile | Split | Elapsed |
|---|
Training paces for this goal
The everyday paces that build the fitness behind your goal, worked out from your target with the Daniels VDOT model. Save these for your next training block.
Treat these as a guide. Run easy days by feel, and adjust for heat, hills and how your legs feel that day.
Racing more than this one?
The BestRaces email: the races our numbers say are worth the trip, and a heads-up when your race week arrives.
Beta. The splits are exact math on your goal time. The terrain and weather notes are estimates from this race's listing, not a forecast.
Run this one?
Tell other runners it's worth the entry fee. One tap, no email, no account.
Votes don't affect the ranking. Here's what does →