Emerson, Lake & Palmer’s performance at the historic 1974 California Jam festival officially be released for the first time on December 11th. ‘Live in California, 1974’ marks the first time the British prog-rock trio’s set at the landmark event will officially be released. California Jam took place on April 6, 1974, at the Ontario Motor Speedway in Ontario, California, and was attended by an estimated quarter-of-a-million people.

ELP appeared at Cal Jam during the height of its popularity, when the band was touring in support of its classic 1973 record Brain Salad Surgery. Among the songs they performed were “Lucky Man,” “Still…You Turn Me On” and an epic rendition of the Modest Mussorgsky piece “Pictures at an Exhibition.”

In the album’s liner notes, frontman Greg Lake says of ELP’s set, “The band was at the very pinnacle of their performing powers, the event was of biblical proportions and the performance itself was almost flawless.”

Adds drummer Carl Palmer, “This was a monumental moment in the history of ELP, and will always be remembered by myself with great pride.”

Live in California is part of an ongoing series of archival ELP recordings that the Shout! Factory label is issuing. Here is the album’s full track list:

“Toccata”
“Still…You Turn Me On”
“Lucky Man”
“Piano Improvisations” (including “Fugue” and “Little Rock Getaway”)
“Take a Pebble”
“Karn Evil 9, First Impression Part 2”
“Karn Evil 9, Third Impression”
“Pictures at an Exhibition”