Challenge of the Yukon

Challenge of the Yukon is an American radio adventure series that began on Detroit's WXYZ and is an example of a Northern genre story. The series was first heard on January 3, 1939. The title changed from Challenge of the Yukon to Sergeant Preston of the Yukon in September 1950, and remained under that name through the end of the series and into a television adaptation.

The program was an adventure series about Sergeant Frank Preston of the North-West Mounted Police and his lead sled dog, Yukon King, as they fought evildoers in the Northern wilderness during the Gold Rush of the 1890s. The serial began on radio in 1938 and continued through 1947, after which the series moved to television. The original television program ran from 1947 through 1949 on ABC and was sponsored by Quaker Oats. In January 1951, the radio version was resurrected, running until 1955 , when the show moved once again to television as Sergeant Preston of the Yukon. The show starred Richard Simmons.

The theme music was Emil von Reznicek's overture to Donna Diana, an old opera, though the overture remains a concert staple to this day. The show's episodes ended with the official pronouncement, Well, King, this case is closed.