Donkeys are no longer used for tourist transport in Grand Canyon National Park. Since the early 20th century, mules (horse × donkey hybrids) have been the exclusive pack and riding animals for guided trips into the canyon. Mules are preferred because they:
Xanterra Travel Collection (concessionaire) operates mule rides from the South Rim (Bright Angel Trail to Phantom Ranch, 10.5 mi) and North Rim (North Kaibab Trail). Riders must meet weight/height limits; reservations book months ahead. Donkeys are occasionally used for supply packs in remote areas, but not for passenger transport. The iconic "Grand Canyon mule" is a cultural and operational staple.