"Jackass Night Trail", a single-loop night race on the SAME standard 19.45-mile loop used for loops 2+ of the 100 Mile and 100K (not the longer Escondido loop) -- a costumed evening/overnight party lap through Coyote Camp, Jackass Junction and Rattlesnake Ranch and back to Javelina Jeadquarters. No pacers. Runs entirely after sunset (6:12 PM).
Runs the STANDARD 19.45-mile loop only (no Escondido variant) -- confirmed by this course's own minimum elevation (1,676 ft) being HIGHER than the 100 Mile/100K's minimum (1,623 ft), consistent with the Escondido Trail (only run on those courses' first loop) reaching the trail system's lowest point, which the 31K never visits. Published distance '19 Miles' / '31K' (31 km = ~19.26 mi) is close to but not identical to the computed 19.45 mi standard loop; treated as the same loop with normal race-naming rounding, per _meta.notes.
A costumed, Halloween-weekend 100 mile (plus 100K and 31K) trail run on a roughly 20-mile loop of the Pemberton Trail system in McDowell Mountain Regional Park near Fountain Hills, Arizona, run out of a single desert basecamp ("Javelina Jeadquarters") that runners, crew and campers share for the whole weekend. Billed by its own organizers as "the original costumed 100 mile trail run party."
Founded in 2003 by Phoenix ultrarunner Geri Kilgariff as a joking idea with running partner Anthony "Woofie" Humpage while running the Pemberton Trail; Kilgariff expected maybe 50 entrants and got 180. The race was won that first year by Stephanie Ehret, one of the first 100-mile races won by a woman. Directed by James and Rodger Wrublik for several years, then by Jamil Coury starting in 2008; Coury founded Aravaipa Running in 2009, which has organized Javelina ever since.
| Mile | Station | Cutoff | Crew | Bag | Pacer | Med | To next |
|---|---|---|---|---|---|---|---|
| 0.00 | Javelina Jeadquarters | ? | ● | ? | ? | ? | 2.95 |
| 2.95 | Coyote Camp | ? | · | ? | ? | ? | 6.50 |
| 9.45 | Jackass Junction | ? | · | ? | ? | ? | 6.25 |
| 15.70 | Rattlesnake Ranch | ? | · | ? | ? | ? | 3.75 |
| 19.45 | Javelina Jeadquarters | 2:30am | ● | ? | ? | ? | ? |
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