In the Kaibab National Forest, this 10 mile mountain bike loop follows a limited-use road (FS138) through pine habitat with lush undergrowth. From Williams -> CR73 (4th St.) south 8.5 mi. -> FS110 east 10 mi. -> FS105 3 mi. -> FS138 -> park at intersection.
Overall, Round Mountain Loop is the 86th most popular mountain bike trail of all 103 mountain biking rides in Arizona.