Javelina Jundred

The Javelina Jundred is a unique 100-mile and 100-kilometer trail running event held annually in late October at McDowell Mountain Regional Park near Fountain Hills, Arizona. Known as the original costumed "Jalloween" party run, it features a festive atmosphere with runners encouraged to dress up. The course consists of rolling single-track trails through the Sonoran Desert, including iconic sights like giant Saguaro cacti and granite boulders, laid out in five loops ranging from about 19 to 22 miles each.

The event also includes a 31K night race called the Jackass Night Trail. It serves as a Western States 100 qualifier, attracting a vibrant community of endurance runners. Visit the organization's website for the most recent information.