Mountain Jam  "Mountain Jam" is an improvised instrumental jam by The Allman Brothers Band. The song's first known recording was done on May 4, 1969 at Macon Central Park. "Mountain Jam" was originally released in 1972 on the album "Eat a Peach", as recorded at the Fillmore East concert hall in March 1971 during the same sessions that produced their prior live double album "At Fillmore East". That is the rendition that is best known. Other live recordings were released on the albums "Fillmore East, February 1970", "", "", "The Fillmore Concerts", and deluxe edition of "At Fillmore East" (1971). Notably, "" contains two recordings of the song (the second of which features guest musicians Johnny Winter on slide guitar and Thom Doucette on harmonica). There was much interplay in the development of this song between The Allman Brothers Band and another influential jam band, the Grateful Dead. According to the book "Bill Graham Presents", one night at the Fillmore East when The Allman Brothers were there with the Grateful Dead and Peter Green's Fleetwood Mac, Bill Graham came into an area where Duane Allman, Peter Green, and Jerry Garcia were jamming together on Donovan's 1967 hit single "There Is a Mountain"; Jimi Hendrix's "Third Stone from the Sun" is also quoted musically in the piece, roughly 22 minutes in. Also heard is a section of the hymn "Will the Circle Be Unbroken". Preceding The Allman Brothers Band's official release of the song, the Grateful Dead had briefly referenced "There Is a Mountain," both live and in studio. They can be heard quoting a few bars of "There is a Mountain" in their song "Alligator" on their 1968 album "Anthem of the Sun". An example of the Dead jamming live on the "There is a Mountain" riff can be heard at the 4:53 mark on the version of "Alligator" they performed at their August 21, 1968, show at the Fillmore West. Conversely, after the Allman Brothers Band release, The Grateful Dead performed a 22:57 version of Mountain Jam on July 28, 1973, at the Summer Jam at Watkins Glen. They also played a 55-second version of "Mountain Jam" to transition between "Going Down the Road Feeling Bad" and "Not Fade Away" on November 6, 1970, at Capitol Theater in Port Chester, New York.  33:41 in length in its March 1971 "Eat a Peach" performance, the song is instrumental and features solos from all of the band members.