Nantucket Sleighride is the second studio album by American hard rock band Mountain, released in January 1971 by Windfall Records in the US and by Island in the UK. It reached number 16 on the Billboard Hot 200 Album Chart in 1971.

Twin Peaks is the third live album by American hard rock band Mountain, released in February 1974 by Columbia and Windfall Records. It contains recordings from the band's performance at Koseinenkin Hall in Osaka, Japan on August 30, 1973. The album was produced by the band's bassist and second vocalist Felix Pappalardi, while the artwork was created by his wife and collaborator Gail Collins. It was Mountain's first release since returning after a year-long hiatus.