Google Lens entry:

This landscape presents a view in the Harz Mountains, the northernmost range in Germany. Whittredge traveled there in the summer of 1852, accompanied by the German painter Carl Freidrich Lessing, a teacher at the Düsseldorf Academy. A late-summer sketching trip was part of a landscape painter's life in Düsseldorf, and Whittredge participated in the ritual annually, making drawings of the local countryside.

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)
From the Harz Mountains (Riders in the Harz
Mountains), 1853
Oil on canvas
Gift of Mr. and Mrs. John D. Rockefeller 3rd
1989.8

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.
Whittredge later expressed doubts about the value of foreign
study for an American artist:

It was then, is now, and probably always will be a question
whether our students going abroad to study art, are likely to
make better artists than if they stayed home. Frankly, I doubt the
desirability of long foreign study. A flying visit across the water
is not objectionable but rather to be commended. But to go
abroad and to become so fascinated with the art life in Paris and
other great centers as to take up permanent abode there is not
everywhere believed to be the best thing for an American artist.

Worthington Whittredge, The Autobiography of Worthington Whittredge,
ed. John I. H. Baur (Brooklyn: Brooklyn Museum of Art, 1942), 30-40