Morning, the Dance of the Nymphs, ca 1850, Louvre Jean-Baptiste-Camille Corot (1796-1875)

The picture has something of this: tree, fog, landscape, mist, dawn, wood, park, nature, water, fall, outdoors, people, leaf, light, river, grass.
Perhaps it’s a painting of a group of people in a wooded area with a man on a horse in the foreground and a man.