Because most of the lake is surrounded by steep sandstone walls, access is limited to developed marinas. The heavily used Wahweap and Antelope Point Marinas are located in Arizona, close to Page. Two other marinas at Halls Crossing and Bullfrog are located further upstream in Utah. The Hite Marina, located at the upper end of the reservoir near the Hite Crossing Bridge, is now disused since the water level is usually too low for boats to launch there. Other facilities at Dangling Rope and Rainbow Bridge are accessible only by boat. Aside from the bridges at either end of the lake, a car-and-passenger ferry between Halls Crossing and Bullfrog is the only way for vehicles to cross Lake Powell.