Which band headlined the 1969 Altamont Free Concert in California?

The Rolling Stones headlined the 1969 Altamont Free Concert in California.

The concert took place on December 6, 1969, at the Altamont Speedway near Livermore. It was organized as a free event featuring major acts including Santana, Jefferson Airplane, the Flying Burrito Brothers, and Crosby, Stills, Nash & Young, with the Rolling Stones as the headline act.

The event became notorious for serious crowd-control problems, poor conditions, and violence near the stage. The Hells Angels motorcycle club had been hired to provide security, and Meredith Hunter was fatally stabbed during an altercation in front of the stage. The incident was documented in the concert film Gimme Shelter.

Altamont is often contrasted with Woodstock earlier in 1969. Some writers describe it as a symbolic end to the idealism associated with the decade’s major counterculture festivals, although that interpretation is a cultural judgment rather than the event’s official name.