The out-and-back hike on the Havasupai Reservation in the Grand Canyon to the famous Havasu Falls is a 10-mile, 2000-foot descent of moderate difficulty that is a bit more challenging on the ascent. The Hualapai Hilltop Trailhead begins with a series of switchbacks through tall cliffs and colorful sandstone and shale canyon walls for approximately a mile. At the end of the switchbacks the trail continues through sandy washes and over gravel and dirt footpaths until reaching an area known as the Narrows.
Eventually the trail passes from Hualapai Canyon into Havasu Canyon before reaching the Havasupai village of Supai. Supai is approximately 8 miles from the trailhead. The village has the Havasupai Tourism Office in addition to a general store that sells cold drinks and food and a Tribal Cafe. From Supai you'll have plenty of opportunities for further exploration, including the highly recommended hike to Mooney Falls and Beaver Falls.
Note that the return trip is steep and exposed; consider hiking early in the day, and be sure to bring plenty of water and sun protection.
Advance reservations for camping and lodging in Supai are recommended. Phone numbers and mailing address can be found on the national park site, and more information on fees, permits, and lodging can be found on the Havasupai tourism site.