Vancouver, Washington's Hauler load up on stoner and sludge metal, riding massive, distortion-soaked riffs at a pace that feels like a freight train operating at half speed — deliberate, heavy, and impossible to ignore.

New Orleans sludge/doom outfit Hawg Jaw embody the Crescent City's grimy, humidity-soaked approach to heavy music — slow, churning, and perpetually on the verge of collapse in the best possible way. Since 2009 they've been one of the Bayou scene's more viscerally satisfying acts.

Named for the folding knife favored across rural Appalachia, Manchester, Kentucky's Hawkbill play sludge metal with the blunt, unhurried menace of the region itself. Since 2017 they've crafted a sound that feels earned rather than stylistically borrowed — all low end and coal-seam grit.

Boston's Head in Hand navigate the slow-motion grief of sludge/doom/post-metal, crafting music that moves at the pace of catastrophe and carries the weight to match. Since 2020 they've contributed to a New England extreme scene that has increasingly embraced heavy, meditative forms.

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.

South Carolina's Heathen Bastard have been brewing a potent mix of stoner, sludge, and doom out of Florence since 2013 — grimy, low-slung music with Southern humidity baked into every riff. They occupy the nastier, swampier end of the American heavy underground.

Richmond's Hectic Polarity navigate the disorienting space between industrial metal's mechanical pulse and sludge metal's tar-thick riffing, producing music that's both mechanically precise and organically crushing. Formed in 2020, they represent a relatively uncommon pairing in the American underground.

Providence's Heel drag death metal's grim cadence through the mire of sludge, producing something heavier and more hostile than either genre accomplishes alone. Active since 2017, they're a natural fit in Rhode Island's gritty underground, where the two scenes have long overlapped.

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.