I live up by Farmington NM we have some dunes up here thats not to bad about 850 acres, There are also some dunes east of Roswell that are fair to ride on. being in the lincoln forrest your best bet is to go to the NM BLM site and get all the info there also we are regulate by the Game and Fish Dept,
www.b4uride.com give most of the info you need,Also since you are in the Sacramento Mtns its not to awful far to Kermit Texas to ride the dunes are not real big 50-100ft max, but they are really choppy and a lot of fun to ride,
www.duneguide.com gives some info on them also, I rode Kermit for years till I moved away, still the best bet if you want to ride the forrest is to contact the BLM, just make sure if you ride BLM lands that you register your bikes NM wants the money but then again it is the Land of Entrapment......:steamed: Hope this helps a bit.:yay: