Google Lens entry:

Whittredge likely made this painting on the last of three journeys to the American West. He was deeply impressed by the beauty of the western countryside, stating: "Nothing could be more like an Arcadian landscape . . . the earth covered with soft grass waving in the wind, with innumerable flowers often covering acres with a single color as if they had been planted there."

Born in a log cabin in Ohio, Worthington Whittredge traveled to Germany in 1849 to study painting with Emanuel Leutze at the Düsseldorf Academy. He remained in Europe for ten years before returning to the United States, settling in New York City and becoming a major figure of the Hudson River School. Despite living in a major city, Whittredge returned again and again to the subject of American landscapes and forest interiors.

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Worthington Whittredge (1820-1910)
On the Cache la Poudre River, Colorado, 1871
Oil on canvas
Museum purchase, Roscoe and Margaret Oakes Income Fund
1986.39

Worthington Whittredge likely made this painting on the last of
three journeys to the American West:

Whittredge, a New York artist of no little celebrity . . . has been
. . . making sketches of mountain and river scenery. . . . A large
cottonwood has been sketched and partially painted, and it now
looks as though it would become a remarkably fine picture. . . .
Some of his views of the Cache la Poudre are charming.
Greeley (Colorado) Tribune (July 19, 1871)

Whittredge was deeply impressed by the beauty of the western
countryside, stating:

Nothing could be more like an Arcadian landscape . . . the earth
covered with soft grass waving in the wind, with innumerable
flowers often covering acres with a single color as if they had
been planted there.

Worthington Whittredge, The Autobiography of Worthington Whittredge,
ed. John I. H. Baur, (Brooklyn: Brooklyn Museum of Art, 1942), 46