By the late 1800's the west was not nearly as wild as it once was. Towns with churches, schools, and jails dotted the landscape.
Advancing railroad and telegraph lines made it more and more difficult for outlaws to hide from the lawmen who constantly pursued them. To avoid being captured the outlaws had to use the most remote locations for their hideouts.
Butch, Sundance and the Wild Bunch used three of the most famous hideouts. These were Hole-in-the-Wall in Wyoming, Brown's Park on the Colorado-Utah border, and Robbers Roost in Southeastern Utah.
What was it that made these places such great hideouts for these notorious outlaws? First, all three were very difficult to reach. Even today these places are miles from civilization and can only be reached by traveling on rugged dirt roads.
These were great hideouts because they are located in deep valleys, canyons and rivers. These things limit access to only a few strategic places. A few men could easily guard these entry points. If someone approached the outlaws had plenty of advanced notice.