Your photos were taken in the central region of the San Rafael Swell. Interstate 70 divides the northern region from the southern region. The size of the Swell measures approximately 75 miles north to south by 40 miles east to west and it is a huge playground for those interested in canyoneering, hiking, backpacking, rock climbing, horseback riding, mountain biking, dirt biking, and riding ATVs. In big runoff years, there is a window of opportunity to kayak and river raft as well. Not an inviting place to recreate in the summer, especially this summer, as the Swell acts as a very big oven, with little shade or water available. The limited road network is susceptible to flash flooding during monsoon season also. There's not a great deal of wildlife found in the Swell: the usual desert-dwelling reptiles, large birds of prey, and herds of wild horses and donkeys constitute the majority of animals I've seen during my many visits.