Hills of Old Wyoming is a 1937 American Western film directed by Nate Watt and written by Maurice Geraghty, the 10th film of the 66 Hopalong Cassidy movies. The film stars William Boyd, George "Gabby" Hayes, Morris Ankrum, Russell Hayden, Gail Sheridan, John Beach and Clara Kimball Young, Russell Hayden makes his first (of 27 consecutive) appearances. The film was released on April 16, 1937, by Paramount Pictures.

Plot

An evil deputy is using Indian mixed-blood individuals to rustle cattle. This causes trouble between the cattlemen and the Indians. Hoppy, Windy and Lucky see that justice is served. Songs abound.