For me the worst part of the entire experience is driving up the steep, dirt/gravel winding and sometimes narrow road. If the washboard surface and hairpin turns are not enough to make one feel uncomfortable, then the racing 4-wheelers certainly are. The riders on these ATVs seem not to care one whit for safety, and I would expect that around every sharp corner there could be one or two of these things smack in the middle of the road. The canyon road is, in my opinion, made even more dangerous by the presence of ATVs. Allow at least 35-40 minutes to negotiate a one-way trip up or down the canyon itself.