When The Mountains Tremble is a 1983 documentary film produced by Skylight Pictures about the war between the Guatemalan Military and the Mayan Indigenous population of Guatemala.

Footage from this film was used as forensic evidence in the Guatemalan court for crimes against humanity, in the genocide case against Efraín Ríos Montt.

The film centers on the experiences of Nobel Prize winner Rigoberta Menchú, a Quiché indigenous woman who won the Nobel Peace Prize in 1992, nine years after the film came out. When The Mountains Tremble won the Special Jury Award at the Sundance Film Festival, the Blue Ribbon Award at the American Film Festival, and the Grand Coral Award/Best North American Documentary at the Havana Film Festival.

A follow-up film was released in 2011, titled Granito: How to Nail a Dictator.