I was hoping to find some one out there that had ridden the dunes of Samalayuca!
If you are a Si FI fan you have probably seen the movie Dune and this is where the original film was shot. 93 square miles of sand dunes and its just 35 miles south of El Paso Texas!

http://paces.geo.utep.edu/elpjuarez/samalayuca.html This is a link to a picture of a aerial view the dunes.

I will be putting together a group ride at some point in time. It is of course in Mexico and you do need paper for you Bikes and Quads. I also know a tour guide that runs motorcycle on and off road trips in Mexico and I am hoping he can put this together on an on going basis of there is enough interest!