Trappist formed in California around 2014 as a collaborative project between Chris Dodge of Spazz and Infest, Phil Vera of Despise You and (16), and Ryan Harkins, initially as a two-piece before expanding. The band's entire thematic premise is craft beer culture, rendered through Discharge-influenced d-beat, crust punk, powerviolence, and hardcore played at punishing speeds. Their debut full-length Ancient Brewing Tactics (2018) comprised 21 tracks in 33 minutes and featured guest appearances from Tony Foresta of Municipal Waste and Steve Brooks of Torche. The project operates as a side outlet for members with extensive histories in the American hardcore underground.

San Francisco's Trauma draw from the city's storied metal heritage, reviving the power and speed metal traditions of the Bay Area with anthemic riffs and a high-octane approach that recalls the scene's 1980s heyday.

Santa Cruz, California's Traveler are devoted practitioners of traditional heavy metal, formed in 2018 with a clear passion for the melodic power and galloping riff structures of the genre's classic era.

Sacramento's Traversing the Cliffs of Insanity pair their theatrical name with a heavy metal and hard rock sound formed in 2023, channeling the drama and arena-ready swagger that the name itself invites.

San Francisco-based solo project Travis Rinker has operated in the progressive metal world since 2011, offering a vehicle for intricate, technically ambitious guitar-driven compositions outside of any traditional band structure.

Ceres, California's Trayjen have been active in the black metal underground since 2007, a long-running project from the Central Valley that operates well outside the state's more prominent coastal metal scenes.

Santa Rosa, California speed and thrash metal band that has been at it since 2016, leaning into the tighter, faster end of the thrash spectrum with a nod to first-wave speed metal ferocity. A decade-long presence in the Bay Area's underground metal circuit.

Santa Cruz, California doom and sludge trio that has been cultivating slow, toxic heaviness since 2017, combining the crushing weight of doom with stoner haze and sludge's abrasive edge. Their Bandcamp handle hints at a UK-influenced atmosphere despite their West Coast roots.

Los Angeles death-thrash band formed in 2016, merging the technical aggression of death metal with thrash's velocity and street-level intensity. A decade into their career, they remain rooted in the DIY ethos of the LA underground.