Opened in March 1968 as the counterpart to San Francisco’s Fillmore Auditorium, concert promoter Bill Graham’s New York City-based Fillmore East served as one of the hubs of live music in the northeast through the late ’60s and into early ’70s. Dubbed the “Church of Rock and Roll” for good reason, Graham had a knack of uniting some of the most unique and explosive artists of the generation under the same roof, which through the years included John Lennon, Frank Zappa, Van Morrison, Led Zeppelin, and Crosby, Stills, Nash and Young.

On February 11th, 1970, Graham booked a now-legendary triple billing of San Francisco fixtures with the Grateful Dead, Los Angeles psych-rockers Love, and a relatively unknown group from the Atlanta area–the Allman Brothers Band.

Though the Allmans and Dead had met some months prior at the first Atlanta Pop Festival, it wouldn’t be until the bands’ 1970 Fillmore East show that the two iconic jam bands collaborated on stage. The Allman Brothers’ set that night included originals “In Memory Of Elizabeth Reed”, “Trouble No More”, and the always gargantuan instrumental that is “Mountain Jam”, along with covers of Blind Willie McTell‘s “Statesboro Blues” and Willie Dixon’s “Hoochie Coochie Man”.

Playing both an early and late show–as was customary at the Fillmore East–the Grateful Dead began their own set with an intense “The Other One” that segued into “Cryptical Envelopment” before finishing up with “Dire Wolf” and “Casey Jones”. The latter two would appear on the Dead’s Americana-inspired studio album, Workingman’s Dead when it arrived on Warner Bros. Records later that year. “Not Fade Away” was used as a launch pad for the rest of the smoking set, which also included another pair of Workingman’s cuts, “Cumberland Blues” and “High Time”.

Beginning with “Dark Star” staple jam in any Dead’s live vocabulary, the band settled into the true meat of the show. For this rendition, the band featured the mesmerizing slide guitar from Duane Allman, which was later augmented further when Fleetwood Mac guitarist Peter Green (who was not on the bill that night but had been a fan of the Dead’s since playing with them in San Francisco in June 1968) and Love’s Arthur Lee (percussion) were added into the performance.

As the “Dark Star” jam built and boiled with the three guitar players on stage, the song gave way to a rare Miles Davis-inspired “Spanish Jam” as Gregg Allman slid onto the organ bench. Finally, as Pigpen busts into a raging “Turn On Your Lovelight”, Gregg gets in on the party to trade vocals with Pigpen on this show-stopper.

Relive what was an unreal collaborative performance from February 11, 1970, below.

Grateful Dead – Fillmore East [Full-Show] – 2/11/1970

[Audio: Darrin Sacks]

Setlist: Grateful Dead | The Fillmore East | New York, NY | 2/11/1970

Early Show: The Other One > Cryptical Envelopment, Dire Wolf, Casey Jones

Late Show: Not Fade Away, Cumberland Blues, Cold Rain And Snow, High Time, Me And My Uncle, Dark Star*! > Spanish Jam*# > Turn On Your Lovelight#

Encore: Uncle John’s Band^

* with Duane Allman and Peter Green

! with Arthur Lee

# with Duane Allman, Gregg Allman and Peter Green

^ acoustic