The Slickrock trail defies the laws of physics as you just can't believe the bike tires stick to the rock on virtually vertical ascents and descents. Arches National park is a sight to behold, but it is so touristy that it feels like Disney Land. Canyonlands, on the other hand, is practically deserted and you feel like you have the place all to yourself, for which I highly recommend it. I wish I had more than a few days here because these pictures are 1% of what's out there.