Los Angeles psychedelic sludge merchants Garbeast layer sun-scorched fuzz over cavernous doom tempos, conjuring something hallucinatory and heavy in equal measure. Since forming in 2021 they've leaned hard into the ritualistic, slow-burning end of the LA underground.

San Diego's Garth Algar dishes out stoner-laced sludge metal with the easygoing swagger and slow-rolling heaviness that the Southern California coast seems to generate naturally. Active since 2012, the band's party-ready name belies how genuinely crushing the music gets.

Los Angeles experimental outfit GASP has been pushing at the edges of sludge metal and hardcore since 2009, folding in noise, feedback, and abrasive texture until the genre lines dissolve entirely. Their music is confrontational and unpredictable, shaped by LA's eclectic and uncompromising DIY underground.

Monterey Bay's Granted Earth have spent over a decade weaving progressive ambition into the fabric of sludge, stoner, and post-metal, arriving at something genuinely exploratory. Their music moves between crushing weight and expansive, atmospheric drift with rare intentionality.

San Diego's Graveseer, formed as recently as 2025, traffic in the slow-creeping territory of sludge-doom, building visions out of distortion and dread. Their music is prophetic in its patience — each riff arriving like an omen rather than a blow.

Pasadena's Half Moon Codex operate at the intersection of sludge, drone, and doom — long-form compositions that move with the patience of tectonic plates and the weight to match. Formed in 2018, they're a fixture in the Southern California heavy underground.

California's Hat occupy a grimy corner where death metal's brutality meets sludge metal's oppressive drag, and they've been doing so since 2011. There's a caustic, tar-thick quality to their output — ugly in all the right ways.

Chico, California's Hearses combine drone, sludge, and doom into a crushing slow-motion procession built from sustained dissonance and mountainous low-end pressure. Since 2021 they've inhabited the unhurried, suffocating space where all three genres converge.

Oakland's Hellbeard have been mining the Oakland sludge tradition since 2010, piling down-tuned misery onto doom's already crushing foundation. Their sound carries the Bay Area's industrial grit embedded in every slow, punishing riff.