This really is a great riding area. Maybe not as epic as some other UT and CO locations, but lots of good stuff. As to maps, I found that you could do most of any serious navigation in the area with just the Gazetteer maps in the CO book. I even found some fun singletrack that was shown on the Gazetteer. Also, the adventure shop at the resort at Gateway has done some mapping of its own that I was fairly impressed with, but I forgot the pricing. The area is an amazing mix of heavy forest on the Uncompahgre plateau and into the Manti-La Sal national forest or more "deserty" terrain just about everywhere else. Old uranium mines and natural beauty is everywhere, along with the Dolores river running through a big chunk of it.