Organiser
Javelina Jundred
Fort McDowell, Arizona, United States
31 Oct 2026 – 1 Nov 2026
Loop-format desert 100-miler at McDowell Mountain Regional Park, with a 100K and a Jackass 31K night race.
Train for this raceAbout
The Javelina Jundred is a loop race at McDowell Mountain Regional Park near Fountain Hills, Arizona, starting and finishing at Javelina Jeadquarters. The 100 mile is one 22.3-mile loop plus four 19.45-mile loops, with 6,296 ft of gain.
The weekend also includes a 100K and the Jackass 31K night race. The 2026 edition was held 31 October to 1 November; the 2027 date had not been announced.
Distances
| Name | Distance | Gain | Loss | Vert / km | Min altitude | Max altitude | Start | Start location | Finish | Course | Cutoff | Terrain | Technicality | Aid stations | Badges | Entry fee |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 100 Mile | 160.9 km | 1,919 m | — | 11.9 m/km | — | — | 31 Oct 2026 06:00 America/Phoenix | Javelina Jeadquarters | Javelina Jeadquarters | Multi loop | 30 h | Desert | — | — | — | — |
| 100K | 100 km | 1,206 m | — | 12.1 m/km | — | — | 31 Oct 2026 07:00 America/Phoenix | Javelina Jeadquarters | Javelina Jeadquarters | Multi loop | 29 h | Desert | — | — | — | — |
| Jackass 31K | 30.6 km | 355 m | — | 11.6 m/km | — | — | 31 Oct 2026 | Javelina Jeadquarters | Javelina Jeadquarters | Loop | 8.5 h | Desert | — | — | — | — |
100 Mile terrain notes
One 22.3-mile loop plus four 19.45-mile loops. Elevation 1,623 to 2,486 ft. Wave 2 starts 06:30.
100K terrain notes
One 22.3-mile loop plus two 19.45-mile loops.
Jackass 31K terrain notes
Single-loop night race. The listed final cutoff is 2:00 am Sunday.
Registration
- Status
- Closed
Links
Notes
2026 entry fees from 1 January: 100 mile $525, 100K $375, 31K $195. The 100 mile had a 6:00 am wave and a 6:30 am wave, with a sub-24 hour buckle. Four aid stations per loop.