“A lot was expected of Mountain’s second album when it arrived in January 1971,” (Ultimate Classic Rock). “Nantucket Sleighride appeared 10 months after their debut, Climbing!, and 10 months before third LP, Flowers of Evil.” The New York-based band’s release “was another strong offering, highlighted by the nearly six-minute title track.
Referencing the true story of a young man whose whaling vessel became the victim of its prey (which inspired Herman Melville’s novel Moby-Dick), it also drew on a 400-year-old Scottish folk tune … Despite being regarded as one of the world’s first heavy metal bands, there was plenty of prog-rock and psychedelic pop to be found here. And it all felt seamless.”
After beginning in E minor, the tune features a contrasting section in A major, running between 1:07 – 1:42. E minor returns in an instrumental interlude at 1:42. Quite a few more shifts in tonality follow.