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Riverside, California's Trapmaker play straight-ahead heavy metal with a no-frills approach rooted in the classic American tradition, forming in 2017 and building a steady presence in the Inland Empire scene.

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.

Los Angeles-based Trey Xavier is a solo heavy metal project dating back to 2016, encompassing a wide stylistic range under the metal umbrella — fitting for a city where genre lines are often treated as suggestions. The project has the character of a personal document more than a band proper.

Trial by Fire is a progressive/power metal band from Red Bluff, California, formed in 2019, blending soaring melodic vocals and complex song structures within the classic power metal framework.

Trick or Treat is a heavy metal and hard rock band from Los Angeles, California, formed in 2025, drawing on classic metal and rock traditions from one of America's most storied hard rock scenes.

TriggerEffect is a heavy metal and hard rock band from Lodi, California, formed in 2007, rooted in straightforward guitar-driven rock and metal from the Central Valley.

Trollfat is a California-based blackened heavy metal act formed in 2024, fusing the raw aggression of black metal with the driving, riff-forward energy of traditional heavy metal.