Notably, Live at the Atlanta International Pop Festival: July 3 & 5, 1970 contains two recordings of the song, the second of which features guest musicians Johnny Winter on slide guitar and Thom Doucette on harmonica.
[1] 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.
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.
[2] 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.
Midway through the song there is a drum duet by Butch Trucks and Jaimoe, later joined by a bass guitar solo by Berry Oakley.