California black metal project Moss Witch emerged in 2020, channeling a raw, nature-fixated aesthetic through cold, sparse compositions — their Bandcamp handle hints at a deliberately obscure, occult-adjacent personality.

California-based Mossen have been practicing uncompromising raw black metal since 2017, stripping the genre down to its most confrontational and lo-fi extremes with a cold, primordial approach that owes little to modern production trends.

Santa Clara, California's Mother Earth have been delivering no-frills heavy/thrash metal since 2016, maintaining a traditional approach to riff construction and song structure in the Bay Area, a region with a long and storied thrash lineage.

El Segundo, California's Mother Mutiny lean into the psychedelic end of stoner metal, formed in 2020 with a sound built on looping riff hypnosis and fuzz saturation — a SoCal act that treats tone as the primary instrument.

Los Angeles heavy metal and hard rock supergroup Motor Sister draw together seasoned players from the New York and LA metal scenes to deliver unapologetically loud, riff-driven rock that worships at the altar of Motorhead and classic NWOBHM. Since forming in 2015 they have been a love letter to the era when heavy metal and hard rock were indistinguishable.

Los Angeles progressive groove metal outfit Mountainhead approach heaviness with a rhythmic sophistication that separates them from the genre's more straightforward practitioners, weaving syncopated groove into ambitious, shifting song structures. Formed in 2016, they represent a more cerebral and technically adventurous corner of the LA metal scene.

Los Angeles doom and sludge metal act Mourn (not to be confused with the Tennessee project sharing the name) drag their heaviness through a thick layer of Southern California nihilism, building slow, corrosive compositions rooted in the sludge tradition. Formed in 2015, they add another bleak and unrelenting entry to LA's well-populated heavy underground.

A Glendale, California thrash outfit active since 2023, this Mournblade brings a West Coast bite to aggressive, riff-forward thrash metal rooted in the Bay Area and Southern California traditions.

Santa Rosa, California's Mournful Cries marry the crushing tempos of doom with the melodic vocabulary of traditional heavy metal, crafting songs that carry a brooding emotional weight alongside genuine riff craftsmanship.