Fort McDowell, Arizona · Trail
Official site ↗Javelina Jundred
The original costumed 100-mile desert party: five loops of the Pemberton Trail in McDowell Mountain Regional Park on Halloween weekend, and a Western States Golden Ticket race.
Starts Saturday, October 31, 2026 at 6:00 AM GMT-7
The National Weather Service has McDowell Mountain under a Flood Watch from 11 p.m. Saturday until 5 a.m. Monday, with 1 to 2 inches of rain forecast Saturday night and 1 to 2 more on Sunday. The course runs through sandy washes, and the race has announced no change to it.
Sold out.
Distances
100 Miles
- Distance
- 100 mi (161 km)
- Vert gain
- 6,296 ft (1,900 m)
- Cutoff
- 30 hr
One 22.3-mile loop and four of 19.45 on the Pemberton, Shallmo and Cinch Trails; waves at 6:00 and 6:30 AM · WSER 2027 qualifier (sub-30:00)
100K
- Distance
- 62 mi (100 km)
- Vert gain
- 3,956 ft (1,200 m)
- Start
- 7:00 AM GMT-7
- Cutoff
- 29 hr
One 22.3-mile loop and two of 19.45, from a single 7:00 AM start; 500 places
| Distance | Vert gain | Start | Cutoff | Notes |
|---|---|---|---|---|
| 100 mi (161 km) | 6,296 ft (1,900 m) | — | 30 hr | One 22.3-mile loop and four of 19.45 on the Pemberton, Shallmo and Cinch Trails; waves at 6:00 and 6:30 AM · WSER 2027 qualifier (sub-30:00) |
| 62 mi (100 km) | 3,956 ft (1,200 m) | 7:00 AM GMT-7 | 29 hr | One 22.3-mile loop and two of 19.45, from a single 7:00 AM start; 500 places |
Course records: Tara Dower 13:31:47 (100 Miles, 2025) · Will Murray 12:10:12 (100 Miles, 2025) · Anna Louden 8:13:07 (100K, 2023) · Rajpaul Pannu 7:15:53 (100K, 2023)
Race-day weather
The forecast for Fort McDowell, Arizona on October 31, 2026: high 69°F (21°C), low 61°F (16°C), 89% chance of precipitation.
Forecast via Open-Meteo, refreshed hourly.
About
The Javelina Jundred bills itself as the original costumed 100-mile trail run party: five washing-machine loops of the rolling Pemberton Trail in McDowell Mountain Regional Park near Fountain Hills, Arizona, every Halloween weekend, with a start-finish festival at Javelina Jeadquarters that runs all night. The course is fast (about 6,300 feet of total gain over one 22.3-mile loop and four of 19.45), the costumes are mandatory in spirit, and the atmosphere draws one of the biggest 100-mile fields in the country.
It is also serious racing: a Western States Golden Ticket race, with automatic Western States entries for the top finishers, and both course records fell in 2025 (12:10:12 and 13:31:47). A 100K on the same loops (one of 22.3 miles and two of 19.45, with a 29-hour limit) and the nighttime Jackass 31K share the weekend.
Course
The 100 Mile runs one 22.3-mile loop on the Escondido Trail and four 19.45-mile loops on the Pemberton, Shallmo and Cinch Trails, between 1,623 and 2,486 feet of elevation, with four aid stations per loop. About 6,296 feet of total gain and a 30-hour limit; a two-wave start at 6:00 and 6:30 AM. The 100K runs the same first loop and two of the shorter ones, about 3,956 feet of gain, from a 7:00 AM start with 29 hours to finish.
How to register
Registration is first come, first served on UltraSignup with a 1,000-runner limit in the 100 Mile and 500 in the 100K, and the race fills; a waitlist follows. Finishing under 30 hours qualifies for the Western States lottery, and the top two men and women earn Golden Ticket entries, with roll-down to fifth place.