Recording for Metallica's The Black Album ended in June 1991.
The album's recording span ran from October 6, 1990, to June 16, 1991. The sessions took place mainly at One on One Recording Studios in Los Angeles and were overseen by producer Bob Rock, whose methods pushed the band toward more unified performances and a heavier, more polished sound.
The end of recording came less than two months before the album's August release. After the main sessions, the project still required final production work, including overdubs and mixing. Some of that additional work took place at A&M Studios in Hollywood.
The dates are easy to confuse with the album's other milestones. Four demos were recorded in August 1990, “Enter Sandman” was released as the lead single on July 29, 1991, and the completed album arrived on August 12, 1991. June 1991 specifically marks the end of the recording period.