Indians Traveling near Fort Laramie Albert REDIRECT: Bierstadt

The picture has something of this: mammal, seated, cavalry, camel, people, desert, herder, transportation system, group, man, cowman, cattle, livestock, child, dust, landscape, caravan, recreation.
Perhaps it’s a painting of a group of people riding on the backs of horses in a field with a hill in the background and a cloudy sky.