Altamont Free Concert: At a free concert performed by the Rolling Stones, eighteen-year old Meredith Hunter is stabbed to death by Hells Angels security guards.

The Altamont Speedway Free Festival was a counterculture rock concert in the United States, held on Saturday, December 6, 1969, at the Altamont Speedway outside of Tracy, California. Approximately 300,000 attended the concert, with some anticipating that it would be a "Woodstock West". The Woodstock festival had taken place in Bethel, New York, in mid-August, almost four months earlier.

The Rolling Stones are an English rock band formed in London in 1962. Active for over six decades, they are one of the most popular, influential, and enduring bands of the rock era. In the early 1960s, the band pioneered the gritty, rhythmically driven sound that came to define hard rock. Their first stable line-up consisted of vocalist Mick Jagger, guitarist Keith Richards, multi-instrumentalist Brian Jones, bassist Bill Wyman, and drummer Charlie Watts. During their early years, Jones was the primary leader. Andrew Loog Oldham became their manager in 1963 and encouraged them to write their own songs. The Jagger–Richards partnership soon became the band's primary songwriting and creative force.

The Hells Angels Motorcycle Club (HAMC) is an international outlaw motorcycle club founded in California whose members typically ride Harley-Davidson motorcycles. In the United States and Canada, the Hells Angels are incorporated as the Hells Angels Motorcycle Corporation. Common nicknames for the club are the "H.A.", "Red & White", and "81". With a membership of over 6,000, and 592 charters in 66 countries, the HAMC is the largest outlaw biker club in the world.