BOULDERING a great way to work out and work on technique. Reading Rocks has several different bouldering areas, including a 12 ft. Top Out Boulder. The more advanced bouldering areas are always saturated with endless little problems. Some are downright insane! There are also some beginner areas. You can also always boulder in the main climbing area, where climbers often try to do laps around the gym. A full one-way length goes about 150 feet!