We’re inching ever closer to the long-awaited release of the Grateful Dead documentary Long Strange Trip. Today, producers of the film have unveiled the official trailer for the 241-minute documentary via Yahoo! Movies.

Select theaters across the U.S. will host one-night screening events for the movie on May 25. Then, a number of theaters in New York City and Los Angeles will present screenings of Long Strange Trip starting on May 26. Finally, the long-in-the-making documentary will premiere on Amazon Prime June 2. Amazon Prime Video subscribers will be able to watch the lengthy film starting on June 2 for no additional cost.

The film from director Amir Bar-Lev includes many never-before-seen interviews, footage and photos combined with a career-spanning soundtrack focusing of the Grateful Dead’s live performances. Watch the official trailer for Long Strange Trip: