December ultramarathons in Arizona, United States

Scenic desert landscapes, rolling singletrack, quick ascents and descents on a mix of classic and newer trails in McDowell Mountain Regional Park

High desert ultramarathon on the Arizona Trail with out-and-back segments, expansive views, and northern ridgeline passages near the Santa Rita Mountains

Scenic point-to-point 50k road ultra from Oracle to Catalina along the Santa Catalina mountains, net 2,200-foot descent, mostly paved, desert vistas

Elite, invitation-only ultramarathon featuring competitive 24-hour track racing and a select field of accomplished ultrarunners

Steep, rocky paths and open sun exposure on the Maricopa Trail, finishing in Cave Creek Regional Park with wide Sonoran Desert views