Yellowstone Natural Bridge is a natural arch in Yellowstone National Park, Wyoming, set at an elevation of 7,983 feet. Reached by a hike of a little more than a mile from the Bridge Bay marina parking lot, the arch rises 51 feet above the surrounding terrain. It formed when water eroded through rhyolite rock, creating a freestanding opening in Yellowstone’s volcanic landscape. The bridge is significant as a visible example of erosion shaping the park’s volcanic geology into a distinctive natural feature.