Philadelphia's Hivelords collapse the boundaries between black metal, doom, and sludge into a dense, oppressive mass that borrows from each tradition without fully belonging to any of them. Since 2011 they've occupied a particularly unpleasant corner of the extreme metal underground, and they seem comfortable there.

Cullman, Alabama's Hog Mountin drag sludge and doom through the Southern dirt, conjuring slow, oppressive riffs that feel pulled from the red clay itself. Active since 2013, they embody the bleary, low-end heaviness of the American South.

Murfreesboro, Tennessee's Hooch Head blend stoner metal's hazy warmth with sludge metal's corrosive weight, arriving in 2018 with the sound of cheap liquor and busted amplifiers. Tennessee grime runs deep in every track.

From Peterborough, New Hampshire, Hookermouth have been crafting grimy stoner-sludge metal since 2014, leaning into fuzz-saturated grooves and a stubbornly filthy aesthetic. Not much subtlety, and none is required.

New York's Hung take the melodic and progressive side of death metal seriously, building dense, shifting compositions since 2014 that reward repeated listens. Technically ambitious without losing sight of the riff.

Chicago's Hunters have been roaming the stoner-sludge terrain since 2011, combining hazy psychedelic drift with the kind of low-end punishment the Windy City's heavy underground specializes in. Thick, slow, and suffocating in the best sense.

Salt Lake City's Hyde Park blend stoner, sludge, and doom into something ponderous and psychedelic since 2021, the high-altitude desert setting lending their sound an arid, expansive quality. Fuzz-drenched and unhurried.

Fresno's Hymns to the Stone move at the pace of sediment, layering stoner fuzz, sludge grime, and doom weight into slow-burning rituals of sound. Since 2014, they've treated heaviness as a meditative practice rather than a competition.

Named for one of World War II's most brutal and forgotten campaigns, Fort Worth's Hürtgen Forest channel that same grinding attrition through sludge-drenched doom metal. Since 2016, they've built a sound as punishing and relentless as the battlefield that inspired them.