Enchanted Rock was designated a National Natural Landmark in 1970 and was placed on the National Register of Historic Places in 1984. The Rock is a huge, pink granite exfoliation dome, that rises 425 feet above ground, 1,825 feet above sea level, and covers 640 acres. It is one of the largest batholiths (underground rock formation uncovered by erosion) in the United States. Visitors can enjoy primitive backpacking, camping, hiking, technical rock climbing, picnicking, geological study, bird watching, and star gazing. Please do not disturb plant or animal life, geological features, or Indian or historical artifacts. These park resources are protected by law. Bring your own firewood. Rock climbers must check in at headquarters; route maps and climbing rules are available.