Long Strange Trip is a 2017 American documentary film about the rock band the Grateful Dead. It premiered on January 23, 2017, at the Sundance Film Festival. It had a one-night only nationwide screening on May 25, 2017, and a week-long limited theatrical release in New York and Los Angeles starting on May 26. The film was split into a six-part miniseries, which became available on Amazon Prime Video on June 2, 2017.

Long Strange Trip was directed by Amir Bar-Lev, and has a running time of almost four hours. Martin Scorsese was one of the executive producers. Justin Kreutzmann, the son of Grateful Dead drummer Bill Kreutzmann, was one of the producers.

The film features newly conducted interviews with living band members and friends including Bob Weir and his wife Natascha, Mickey Hart, Bill Kreutzmann, Phil Lesh, John Perry Barlow, Donna Godchaux, Dennis McNally, Barbara "Brigid" Meier, Nick Paumgarten, Steve Silberman, and Alan Trist.

A soundtrack album was released on May 26, 2017.

Long Strange Trip was nominated for a Grammy Award for Best Music Film.