A Pennsylvania drone/doom act formed in 2017, Monolithic strip the genre down to its most elemental form — sustained tones, glacial tempos, and near-meditative repetition that collapses under its own weight.

Detroit's Monolithic Architecture arrived in 2024 with a sludge and doom sound befitting their industrial hometown — slow, corrosive riffs built like crumbling infrastructure, heavy with grime and deliberate intention.

Oakland's Monster God have been churning out doom and sludge metal since 2017, harnessing the Bay Area's legacy of slow, heavy punishment — massive riffs dragged through distortion and misery in equal measure.

Austin doom trio influenced by Neurosis, the Melvins, and Eyehategod.

A death metal act from Newhall, California active since 2012, Montezuma operate in the Los Angeles underground with the punishing directness the genre requires — heavy, methodical, and uninterested in subtlety.

A New England drone/funeral doom project active since 2005, Monument of Urns specialize in extreme slowness and oppressive atmosphere — long-form compositions where texture and tonal weight matter more than conventional song structure.

San Francisco's Monuments Collapse have been working the sludge/doom/post-metal axis since 2013, building lengthy, corrosive tracks that mirror the Bay Area's tension between beauty and decay — slow, caustic, and hauntingly cinematic.

Mookerdam is a Los Angeles band dragging death metal into the swamp, combining crushing doom weight with sludge-coated riffs and an abyssal low-end that has been their signature since forming in 2010. The band occupies the uglier, slower end of the death-doom spectrum, where tempo is a weapon and density is the point.

Moon Curse is a Milwaukee, Wisconsin stoner-doom band formed in 2012, weaving fuzz-heavy riffing through slow, hypnotic grooves in the tradition of the genre's heaviest practitioners. Their sound is built on thick, deliberate tempos and the kind of psychedelic weight that makes the room feel smaller.

Moon of Delirium is a Salt Lake City black-doom project active since 2011, marrying the bleak minimalism of black metal to the crushing, slow-motion weight of doom. The band draws on the isolation of the high desert landscape, channeling it into long, mournful compositions.

Moon Wizard is a Salt Lake City stoner-doom outfit formed in 2019, conjuring thick, fuzz-saturated riffs over slow tempos in the classic tradition of the genre. Their sound leans into the psychedelic and occult rock side of stoner metal, with a heavy groove that suits the Utah landscape's vast, strange terrain.

Moonbreath is a Hammond, Indiana doom metal project formed in 2018, working in the slow, heavy tradition of the genre with a focus on atmosphere and sustained weight. Hammond's industrial character adds a certain grim context to their funeral-paced compositions.

Moonfarmer is a Grand Junction, Colorado sludge-doom project formed in 2024, combining stoner heaviness with sludge's abrasive, tar-thick texture and doom's slow-grinding tempos. Grand Junction's high desert isolation feels right at home in music this massive and unhurried.

A Pennsylvania doom, stoner, and sludge outfit active since 1999, Moons traffic in slow, pulverizing riffs and narcotic haze — occupying the heavy, low-tuned intersection where all three genres bleed together.

Ayer, Massachusetts quartet Moosataur have been crafting psychedelic doom and stoner metal since 2013, layering lysergic haze over slow, crushing riffwork in a style that's as trance-inducing as it is heavy.