San Francisco sludge/doom/post-metal trio formed in 2018, layering colossal low-end riffs beneath post-metal's expansive structural ambitions and sludge's punishing dissonance. Sleepbomb draw naturally from the Bay Area's rich tradition of heavy, slow, and deliberately oppressive music.

Los Angeles sludge, drone, and doom metal band formed in 2020, specializing in oppressively heavy, low-frequency material at the extreme end of the California doom underground.

Los Angeles sludge and death metal band formed in 2024, merging the caustic weight of death metal with sludge's slow, corrosive heaviness in the city's contemporary extreme underground.

California sludge metal band formed in 1996, dealing in the slow, crushing heaviness and feedback-drenched abrasion that defines the West Coast sludge tradition.

Split Lung is a stoner, sludge, and doom metal band from Fresno, California, formed in 2015, specializing in heavy, slow-burning riffs and oppressive atmosphere within the Central Valley's underground heavy music scene.

Pacifica, California sludge metal outfit Squalus formed in 2017, delivering the slow, distortion-heavy weight of sludge metal from the Bay Area coastline with a suitably murky and oppressive sonic identity.

Los Angeles stoner and sludge metal act formed in 2017, stacking fuzzed-out riffs and swamp-heavy grooves against the backdrop of the Southern California heavy underground.

Stone Gnome is a stoner/sludge metal band from San Francisco, California, formed in 2021, fusing the Bay Area's history of heavy psych with grimy sludge textures and psychedelic guitar work.

Stone Sloth is a doom/sludge metal band from Santa Cruz, California, formed in 2016, embracing deliberately slow tempos and down-tuned riffs that capture the heavier side of the Northern California coast's underground scene.