Southwest of Williams in the Kaibab National Forest, the Bill Williams Mountain Loop Road (FS108) is a popular ATV ride located south and west of Williams, which has many view points of aspen groves on Bill Williams and Summit Mountains.
To access the ATV riding at Bill Williams Mountain Loop Road from Williams drive south on Fourth Street, which turns into County Road (CR) 73 just outside the city proper, and is also known as the Perkinsville Road. Head south for about 7 miles, before turning right onto FR 108. The Loop Road passes through scenic forests and wide open prairies, and offers good opportunities for bird watching at Coleman Lake, a waterfowl nesting area. FR 108 is approximately 16 miles in length, has a cinder surface, and suitable for passenger vehicles. The western terminus is the Devil Dog Interchange (exit #157) on Interstate 40, approximately five miles west of Williams. The round trip from Williams is about three hours.
Note: this route is open to street legal ATVs and dirt bikes.
Note: As of September 2007, ATV riding on Forest Service roads is limited to ATVs with valid license plates.
Overall, Bill Williams Mountain Loop Road is the 34th most popular ATV riding trail of all 42 ATV trails in Arizona.