Written and first recorded (as “There is a Mountain”) by Donovan (US #11/UK #8 1967).
Also recorded by Dandy Livingstone (1967).
Adapted by The Allman Brothers (1972).
From the wiki: “‘There Is a Mountain’ is a song and single by British singer/songwriter Donovan, released in 1967 and charting in the US and UK. ‘There is a Mountain’ was first covered, in 1967, by Reggae artist Dandy Livingstone (‘A Message to You, Rudy‘).
“‘Mountain Jam’ is the improvised instrumental jam based on the Donovan song. The Allman Brothers were inspired to improvise on it after hearing the Grateful Dead’s jam ‘Alligator’, from the Dead’s Anthem of the Sun album (1968). ‘Mountain Jam’ was recorded at Fillmore East in March 1971 to be included on the mixed live/studio album Eat A Peach, the last Allman Brothers albums to include founding member and lead guitarist Duane Allman before his accidental death in September 1971.