Filmed in 1967, but not released until 1970, after Jack Nicholson gained fame for his role in Easy Rider (1969).
Bruce Dern and Diane Ladd appeared in this film opposite Harry Dean Stanton. Their daughter, Laura Dern, appeared with Ladd and Stanton in Cuore selvaggio (1990) and Inland Empire - L'impero della mente (2006). Dern and Stanton appeared on Twin Peaks (2017). All three were directed by David Lynch.
According to the biography book Jack: The Great Seducer, this is the only Jack Nicholson movie of his that he never watched.