Southwest of Flagstaff in the Kaibab National Forest, the White Horse Lake Loop is a 28 mile loop open to ATV riding. The route is not recommended when wet due to thick mud.
To reach the ATV trailhead for the White Horse Lake Loop from Williams, head follow 4th Street (S. Perkinsville Rd / FR 173) (at White Horse Lake sign) south 8.4 miles to another White Horse Lake sign (Forest Rt. 110). This is where the loop starts. Follow the road east to the White Horse Lake Campground. Head south and then west to make a loop back to 4th Street (S. Perkinsville Rd. / FR 173.)
Note: As of September 2007, ATV riding on Forest Service roads is limited to ATVs with valid license plates.
Overall, White Horse Lake Loop is the 20th most popular ATV riding trail of all 42 ATV trails in Arizona.