I started the route thru the Mojave Preserve at the Cima Road exit off I-15. Then followed Cima Road to Cima.From there took Kelso Cima Road to the Kelso Depot. Then Kelbaker Road under I-40 to Route 66, National Trails Highway.The boundary of the preserve ends at I-40.
Took Route 66 to Roys motel in Amboy, then took Amboy Road to 29 Palms and Utah Trail Street. Utah Trail is the north entrance road to Joshua Tree National Park.
Utah Trail crosses Hwy 62, which eventually runs into I-10 in Palm Springs.