Arcadia Rock Climbing, aka The ARC, features Southern California's largest bouldering gym. The facility offers various classes for children and adults, including an introductory class for those new to bouldering. Private parties are hosted by experienced staff members. Equipment rentals are also available. The staff can help you train from a novice into a comfortable rock climber. Each rock is a different color to make finding the next climbing spot visible. Visit their website or call for more information.