This sort of thing you’ll frequently encounter on Oatman Road, aka Route 66, between Oatman and Kingman, Ariz.
The burros are wild descendants of the original working animals that were used in the gold mines decades ago. They aren’t exactly tame, but they interact with locals and tourists so much that they’re quite docile. They spend much of the time wandering the streets of Oatman, mooching for carrots.