Hard 100mi ultramarathons in Arizona, United States

Rugged 100-mile route on the Mogollon Rim with 18,000 feet of gain, high desert to Ponderosa Pine transitions, six major climbs, and technical trails.

50- or 100-mile clockwise loop around Prescott, linking standout singletrack and backcountry trails across rugged central Arizona terrain

USATF certified 0.99-mile flat sidewalk loop at Estrella Mountain Regional Park, with foothill views and multi-day ultradistance formats