Each time I return to this book I recognize how many little extras it includes, such as vertical profiles, several ways to find or select a trail, a good place to satisfy post-ride munchies, or the phone number of a local bike shop in a nearby town for an emergency repair.As a 4th generation native of Arizona, I thought I knew my way around, but this book has paid off in directing me to a lot of out of the way trails I never would have found or even heard of swapping ideas with local riders. Do not overlook or underestimate the many "honorable mention" rides included in each chapter.There's another popular book on Arizona mountain bike trails that is sort of a cartoon. Buy that if you want laughs, but buy Mountain Bike America: Arizona if you want a serious reference tool to get the most out of your visits to and around Arizona.