New York Walk Book, 1923

A map from the "pocket edition" of the New York Walk Book, released in 1923 by the American Geographical Society. The publication featured three primary walking routes in the Croton area:

- Salt Hill Route—Croton to Croton Lake Station - Croton Lake Region—Harmon to Millwood - Montrose to Harmon via Spitzenberg and Keg Mountains

The guidebook included detailed pen-and-ink illustrations, including one depicting "the mouth of the Croton River."