Javelina Jundred is a 100 miles ultra marathon in Fountain Hills, United States. Distance: 161km. Elevation: 1,800m D+. Difficulty: moderate (Challenge Rating 35/100). DNF rate: 15%. Surface: trail. Established 2003.
Javelina Jundred
Fountain Hills, Arizona, United States
"The ultimate first 100 miler. Runnable desert loops, incredible community, and Halloween costumes."
America's most beloved beginner-friendly 100 miler — a supportive community race through the beautiful Sonoran Desert.
The Course
A multi-loop desert course through McDowell Mountain Regional Park in the Sonoran Desert. Relatively runnable with moderate elevation gain, making it one of the most popular first-time 100 milers. The desert landscape is beautiful, with saguaro cacti and desert wildflowers.
rolling
multi-loop
4
Runner Experience
Remote course with widely spaced aid points. Runners should be prepared for long unsupported stretches.
Warm, inclusive finish line with a strong community feel. Runners celebrate together regardless of finish time.
Race Day Weather
22°C
12° – 32°
25%
10%
Late October Arizona desert — warm days, cool nights. Dry and generally pleasant.
Stats & Records
2003
500
26:00:00
Entry
$350
February
days
Lore & Trivia
Javelina Jundred — deliberately misspelled with a J — is the rowdiest 100-miler in America. Held on the Pemberton Trail in Arizona's McDowell Mountain Regional Park, the course is a 31km loop repeated until 161km is done. The Sonoran Desert setting means saguaro cacti taller than buses, rattlesnake warnings at every aid station, and October heat that catches East Coast runners off guard. But the real character of Javelina is the aid stations: costumed volunteers, themed party zones, music blasting at 2am, and a culture that celebrates the back-of-pack finishers as loudly as the winners. It's the best-vibes race in ultra.
- ▸ 100 miles on a 31km loop in Arizona's McDowell Mountain Regional Park.
- ▸ Sonoran Desert setting — saguaro cacti, rattlesnakes, and October heat.
- ▸ Legendary aid stations with costumed volunteers and party atmosphere.
- ▸ Celebrated for being the most fun 100-miler in America.
- ▸ Back-of-pack finishers are cheered as loudly as winners.
- ▸ The Pemberton Trail loop means you see your crew every 31km.
- ▸ Rattlesnake warnings at every aid station — real, not decorative.
- ▸ Jim Walmsley used Javelina to redefine 100-mile pacing strategy.
Javelina is the 100-miler that throws you a party while you suffer. Best aid stations in ultra.
Notable Editions
Walmsley's Speed Statement
Jim Walmsley used Javelina as his 100-mile speed laboratory, pushing the pace on the fast desert loop to demonstrate that 100-milers could be raced, not just survived. His aggressive early pace shocked the field and redefined expectations for what 100-mile pacing could look like.
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Frequently Asked Questions
How long is Javelina Jundred? +
Javelina Jundred is a 100 miles (161km) ultra marathon with 1,800m of elevation gain. The course is multi-loop on trail terrain.
How hard is Javelina Jundred? +
Javelina Jundred is rated moderate with a Challenge Rating of 35/100 (Moderate). The DNF rate is 15%.
What is the weather like at Javelina Jundred? +
Average temperature is 22°C (range 12°C to 32°C) with 25% humidity and a 10% chance of rain. Late October Arizona desert — warm days, cool nights. Dry and generally pleasant.
Are crew and pacers allowed at Javelina Jundred? +
Crew access is allowed. Pacers are allowed after 100km.
What is the average finish time for Javelina Jundred? +
The average finish time is 26:00:00. About 500 runners finish each year. The DNF rate is 15%.
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