The Havasupai Indian Reservation, located within the Grand Canyon, is home to beautiful blue-green waterfalls. People travel from across the world to Supai, Arizona to experience these waterfalls. As such, it is often very difficult to make reservations for the limited spots available each year. The Havasupai Tribal Tourism Department works diligently to accommodate as many people as possible per year. At this time, reservations must be made by calling the tourist office at 928-448-2121. Phone lines may be busy due to the high volume of callers so please be patient. All individuals entering Supai, Arizona must have a reservation. The Tribe reserves the right to deny access to any individual who does not have a valid reservation to enter. This means you may have to hike back to Hilltop if you entered without a valid reservation. Each person must be listed on the reservation. This policy applies to the general public and to licensed outfitters unless otherwise noted.