With their multicolored faces, soaring ridges, and thousands of holds affixed to create colorful paths upward, the rock walls at each of Stone Summit's locations look like cubist installations large enough to fill a small warehouse. Follow any series of holds up to the top of these expressionist monuments, though, and scores of individual routes emerge, offering challenges for everyone from entry-level beginners to the most seasoned scaler. Climbers can seek out the tops of routes as high as 60 feet off the facility floor, and bouldering enthusiasts have an entire room filled with near-horizontal overhangs and brain-teasing bouldering problems perfect for studying for the rock-climbing portion of the SAT. Each facility complements its climbing focus with a range of non-climbing exercise opportunities, including treadmills, weight machines, and yoga classes.