The film is based on the 'Colossal Cave Legend'. In 1884, five or six men robbed a mail train near Pantano, a small town near Tucson, Arizona Territory, and south of Colossal Cave, and nabbed about $83,000 in cash and gold. They hid all of the loot and it was never found. The story was also told in the movie Cave of Outlaws (1951) and "Death Valley Days" TV Series episode, 'Up the Chimney' (1968).
The style and tone of the narration is considered reminiscent of The Waltons.
Writer and actor William Shockley played Hank Lawson on Dr Quinn Medicine Woman.