Grand Canyon Mules

Mules are selected for strength, endurance and sure-footedness. They are trained to handle the switchbacks and narrow trails. But, as the wranglers will tell you, they are still animals who may be stubborn at times and may be frightened by an unexpected mountain goat, falling rock or rude hiker on the trail. Oh yes, and did I tell you that the mules walk on the outside half of the trail?