Havasupai Indian ReservationFive turquoise waterfalls in Havasu Canyon — 10-mile hike from Hualapai Hilltop, 3-night minimum, lottery permits

The Havasupai Indian Reservation is the sovereign land of the Havasupai Tribe — about 188,000 acres on the Grand Canyon's southwestern flank, occupied by Havasu 'Baaja for at least 800 years and recognized by treaty in 1882. The village of Supai (population ~200) sits 8 miles down a side canyon at 3,200 feet, two miles upstream of the first major falls. It's one of two settlements in the United States that still receives mail by pack mule — there are no roads in.

The five named waterfalls all plunge over travertine over a 3-mile stretch downstream of Supai: Fifty Foot Falls and Navajo Falls (the upper pair, partially rerouted by 2008 floods), then Havasu Falls (the postcard one — a single 100-foot drop into a wide turquoise pool, two miles from Supai), Mooney Falls (the tallest, 200 feet, descended via a chain-and-stake route through travertine tunnels), and Beaver Falls (a multi-tier set 2 miles past Mooney, near the Colorado River). The water's color comes from dissolved calcium carbonate; concentrations vary with rainfall and temperature.

Getting in: 8 miles of switchbacks from Hualapai Hilltop down to Supai, then 2 miles to the campground above Havasu Falls — 10 miles total each way. Most hikers take 4–6 hours descending, 6–9 hours climbing out. Mule packing is available (your gear, not you); helicopters fly limited days at separate cost. The campground has spring-fed water taps and composting toilets. The lodge in Supai has 25 rooms with private baths but no air conditioning. Summer monsoon season (July–September) carries genuine flash-flood risk — the 2008 flood reshaped Navajo Falls overnight; the 2018 flood evacuated 200 people.