 In America, the 1967 Summer of Love was prefaced by the Human Be-In event and reached its peak at the Monterey Pop Festival.These trends climaxed in the 1969 Woodstock festival, which saw performances by most of the major psychedelic acts, including Jimi Hendrix, Janis Joplin and Santana.By the end of the 1960s, the trend of exploring psychedelia in music was largely in retreat.