Boundless (2013)

S3E1 Arizona: 24-Hour Mountain Bike Race

Considered the "Burning Man" of mountain biking, this race draws a colorful array of participants who tackle a grueling 24-hour loop through the treacherous cacti-laden terrain of the Sonoran Desert. The team faces a series of challenges, including mechanical failures, a critical emergency that halts the race, and the overwhelming fatigue that sets in after dark, all while striving to secure a spot on the podium.