San Francisco's Skin Horse has been wading through thick sludge and crushing doom since 2016, drawing on the Bay Area's fertile heavy underground to craft slow, oppressive music with the weight of the Pacific behind it.

Corona, California's Skinslip work the intersection of sludge and doom, conjuring slow, weight-bearing riffs that reflect the smoggy, sun-bleached desolation of the Inland Empire since their formation in 2014.

Fresno's Skull Incision have been active since 2010, working in the ugly overlap between death metal, grindcore, and sludge — a combination that makes for short, punishing tracks coated in downtuned filth and California Central Valley grime.

Sacramento's Sky Pig have been combining stoner, sludge, and doom metal since 2018, trafficking in slow-grinding riffs soaked in fuzz and feedback that nod equally to Electric Wizard and Saint Vitus. The band occupies the fertile Central Valley heavy underground, where volume is treated as a virtue unto itself.

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.

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.