February ultramarathons in Arizona, United States

50-mile loop around Skull Mesa via Trail 4, Chalk Canyon and Seven Springs, with Sonoran Desert singletrack, creekside stretches and rugged canyons

Arizona Trail ultra through the Madrean Sky Islands, with wide-open high desert views stretching toward Mexico.

Rugged Sonoran Desert point-to-point on the scenic Black Canyon Trail, single track and stagecoach paths, challenging climbs in the second half

Rugged Sonoran desert 50K with Arizona Trail stretches, a loop around Picketpost Mountain, saguaro forests, creeks, and rock formations.