Stewart, Ron – Ponies of Autumn (end Ron Stewart

The picture has something of this: fall, cavalry, outdoors, rural, nature, mammal, group, landscape, tree, people, season, seated, beautiful, winter, snow, outside, countryside, park.
Perhaps it’s a painting of a man on a horse herding a herd of horses through a river with a teepee and teepee teepee teepees in the background.