Is there any published or otherwise routes thru Mexico and Central America and possibly into South America of as much dirt as possible? I know a lot of people like to ride Baja and then ferry to mainland Mexico. I imagine Baja has some awesome stuff as well as the rest of the countries going south. Do most people create their own route as they go or is there some common routes? I did the TAT and I'd like to have a route similar to that. More dirt is better.