Spaceboy is a San Francisco band formed in 2017, navigating an eclectic intersection of progressive stoner, doom, and death metal. Their genre-blending approach reflects the Bay Area's history of genre-boundary-pushing heavy music, layering psychedelic texture over heavier structural ambitions.

SpaceMetal is a stoner metal band from New Orleans, Louisiana, formed in 2015. Emerging from a city with one of America's richest heavy music traditions, they channel the amplified, riff-driven weight of stoner metal with the slow, humid groove endemic to the Crescent City's underground.

Spacetrucker is a grunge-inflected stoner metal band from St. Louis, Missouri, formed in 2016. They blend the fuzz and heavy low-end of stoner metal with the loose, blue-collar swagger of grunge, fitting well within the Midwest's tradition of unpretentious heavy rock.

Spectral Sorcery is a Pennsylvania psychedelic doom and stoner metal band formed in 2023, crafting slow, haze-drenched heavy music that prioritizes atmosphere and lysergic texture over aggression. Their sound draws from the fuzzed-out, riff-worshipping traditions of desert rock and occult doom.

Spent is a Washington state doom and stoner metal band active since 1995, delivering slow, heavily fuzzed riffs steeped in the Pacific Northwest's long tradition of heavy, psychedelic-tinged sludge.

Spirit Division is an Indianapolis, Indiana doom and stoner metal band formed in 2014, delivering fuzz-drenched riffs and hypnotic grooves in the tradition of heavy psychedelic doom.

Spiritu is a stoner and doom metal band from Albuquerque, New Mexico, formed in 2023, fusing the sun-baked heaviness of the desert Southwest with the slow, hypnotic groove of stoner doom.

Spliff Witch is a doom, stoner, and sludge metal band from Anderson, South Carolina, formed in 2021, delivering hazy, heavy-riffed music steeped in the psychedelic fatigue and swamp-weight of the Southern 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.