Fountain Hills, AZ, Arizona, United States · Saturday, October 31, 2026

100 mi

Javelina Jundred

Race completed
161 km Distance
1,919 m Climbing
10.0 Grit · Elite / extreme
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33.6770° N, 111.7260° W© OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 12 m / km Fast & Flat. This course is relatively flat and fast. Ideal for PB attempts.
Time limit 30 hours 11:11 min/km average. Generous. Walkable throughout for most of the field. Tighter than 78% of 100 mi races. Measured against 46 races of the same distance. Cut-off calculator →
Field size ~491 Large. Rarely out of sight of another runner.

DUV results for the 2025 edition (159.2km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, October

Daytime high 31°C
Night low 16°C
Rainfall Dry — rain unlikely
Daylight 10 h 53 m of light

Regional 2001-2020 average for October — NASA POWER, grid elevation 495 m. Not a forecast.

The Aid Station

Course-specific beta from the community

⛰️ terrain

This is a fast & flat course. Expect fast, runnable sections where rhythm is key.

By UltraHub Expert
👟 gear

With desert terrain, choose a shoe with moderate cushioning for optimal performance.

By UltraHub Expert
🥤 nutrition

For 100km+ efforts, prioritize real food at aid stations to prevent palate fatigue.

By UltraHub Expert

Gear for this race

Chosen for 161 km of desert with 1,919 m of ascent.

  • Trail Running Shoes161 km of desert — cushioning that is still there in the last quarter.
  • Race NutritionPast 161 km the palate quits before the legs do — carry more than one flavour.
  • Hydration VestsFlask capacity for 161 km, without the bounce.
  • HeadlampsA 30 h limit puts you out there after dark.
  • AccessoriesChafe and blisters end more 161 km races than fitness does.

Asics

Trabuco Max 2

★★★★★ 4.7

Asics

Trabuco Max 3

★★★★★ 4.6

Tailwind

Endurance Fuel

All-in-one calorie and electrolyte drink mix. 200 calories per serving.

$25 ★★★★★ 4.8

Nathan

VaporKrar 12L

12L race vest co-designed with ultra champion Rob Krar, with insulated bladder pocket.

$170 ★★★★★ 4.6

Petzl

NAO RL

1500-lumen reactive lighting headlamp with 15-hour runtime. Automatic brightness adjustment.

$150 ★★★★★ 4.7

Squirrel's Nut Butter

Anti-Chafe Balm

All-natural anti-chafe balm. Essential for 100+ mile races.

$12 ★★★★★ 4.8
All gear guides →

About

A fast, festive desert 100-miler through the McDowell Mountain Regional Park.

Highlights

  • Desert terrain
  • Halloween-themed
  • One of the fastest 100s

Course Notes

Six (6) washing machine* loops plus a halfaloop on the very runnable 15.4 mile Pemberton Trail. *Alternating directions (clockwise, counterclockwise, clock, counter, etc.) so you get to see the trail.

Similar races

Other 100 mi desert ultras, closest in distance first.