Tremors 4: The Legend Begins (also known as Tremors 4 or Tremors: The Legend Begins) is a 2004 direct-to-video horror Western film directed by S. S. Wilson and written by Brent Maddock, Nancy Roberts, and Wilson. It is the fourth film in the Tremors series of films and released on DVD on January 2, 2004. As a prequel to the earlier films and television series, it depicts the town of Rejection, which is the location that would later be renamed Perfection, the main setting for the first Tremors film. It stars Michael Gross as Hiram Gummer, the great grandfather of the character Burt Gummer, who Gross portrayed in every other Tremors film.

Prim East Coast dandy Hiram Gummer (Gross) arrives in the town of Rejection, Nevada, to investigate a series of strange deaths at the silver mine he owns. Receiving help from local innkeeper Christine Lord (Botsford) and miner Juan Pedilla (Roam), Gummer finds out that gigantic killer worms that can burrow underground are responsible for the miners' deaths. Hiram decides he'd better call in expert gunslinger Black Hand Kelly (Billy Drago) to save the day. However, the worms grow larger and the people of Rejection decide to kill them before they reach Carson City.