Legendary California music festival (pre-Woodstock) that launched the state-side careers of several performers, most notably Jimi Hendrix. Check out Mama Cass being absolutely blown away while watching Joplin sing. Here there be REAL acid rock.Legendary California music festival (pre-Woodstock) that launched the state-side careers of several performers, most notably Jimi Hendrix. Check out Mama Cass being absolutely blown away while watching Joplin sing. Here there be REAL acid rock.