Marrow Deep

Marrow Deep is the ninth studio album by the American heavy metal band Mastodon. It was released on August 28, 2026, by Loma Vista Recordings, the band's first release on the label. Produced by Patrik Berger and Kurt Ballou, it is Mastodon's first album with guitarist Nick Johnston, following the departure and subsequent death of founding lead guitarist Brent Hinds in 2025, and the first with keyboardist João Nogueira as an official member.

The album was recorded in 2025, inspired by the deaths of Brann Dailor's mother and Hinds. It is their first as a five-piece. It was preceded by the lead single "Your Ghost Again", released in June, and "Snakes for Dinner", released in July featuring Josh Homme. It will be supported by the Poisonous Weapons tour, with Deafheaven and Alcest both opening all dates.