Charlie's details help me pick out what I can ride safely on the dirt bikes and what is better for the ATV. This past season I did 14 of the trails and found the descriptions to be accurate. I consider these books must have - just add the National Geographic trails illustrated maps and you are armed and dangerous. I own all his Colorado books and am going to order the Utah books next. Buy these books - knowing what you are getting into is priceless.

--Mark R.