Javelina Jundred — 100 Mile

Event Overview

A social desert-trail 100 using five rolling loops in McDowell Mountain Regional Park, with an estimated 6,296 ft of gain and a 30-hour cutoff.

Course & Terrain

One 22.3-mile opening loop followed by four 19.45-mile loops on the Pemberton, Shallmo, Cinch, and related park trails.

Key course features to know before comparing this race:

• Four Peaks staging-area race headquarters
• Repeated Pemberton Trail and Sonoran Desert loops

Rolling desert singletrack is more runnable than many mountain 100s, but heat, dust, exposure, darkness, and repeated-loop pacing remain significant.

Entry & Logistics

Why This Race Matters

Javelina Jundred — 100 Mile is a useful reference point for runners comparing long fixed-distance ultras where most of the field runs through the night. Its format, terrain, and support model shape the kind of preparation required: not just fitness, but pacing discipline, nutrition planning, foot care, and the ability to make good decisions under fatigue.

Preparing for a Race Like Javelina Jundred — 100 Mile

The 100-mile race guide covers the format as a whole. These guides go deeper:

• Walking strategy for ultramarathons: When and how to walk by terrain, effort and cutoffs.
• Crew and aid-station strategy: Crew tables, aid stops, drop bags and runner preferences.
• Gut training for ultrarunners: A six-week practice sequence for race-day fueling.
• Tapering for ultramarathons: Plan the taper and race week around your own recovery.

Planning Notes

• Treat intermediate cutoff gates as part of the course. Build enough margin for aid stops and late-race slowdown, and verify every current gate in the official rules.
• Heat, sun, and dry air require event-specific preparation. Test sun protection and cooling, drink in response to thirst, and remember that sodium cannot make overdrinking safe.
• The directory does not mark this as having simpler logistics. Confirm qualification, terrain, support, registration, medical, and withdrawal requirements before planning around it.
• Wave starts produce different clock times for the final cutoff
• Rain can flood the desert washes; in 2026 Aravaipa warned of delayed aid-station pickups

Event FAQs

Related Preparation

• Compare verified US 100-mile races
• Browse Arizona Ultramarathons
• Browse Arizona 100-Mile Races
• Compare this race in the full 2026 calendar
• Open the 100-Mile format guide
• Open the Fixed-Distance format guide
• Compare all race formats
• Use the timed-race pace calculator
• Plan checkpoint arrivals and cutoff buffers
• Print a pace band for your goal time
• Estimate race calories and plan fueling
• Build a crew and drop-bag plan
• Build a race-specific gear checklist