Kaibab National Forest FR-100Take exit 178 off I-40 north, then after a quick left onto Route 66, turn north on Spring Valley Road. At Government Mountain Road, turn right. This will take you past a few houses and into the Kaibab National Forest on (road name change) Forest Road 100. State: Arizona City: WilliamsFlagstaff Nearest Town: Williams Status; Unofficial boondocking Cost: Free Nearest Road: Gravel Scenery Rating: 5 Months Opened: Year Round Extras: None Number of Camp Sites: -