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.

Truant is a melodic heavy metal and hard rock band from Vallejo, California, formed in 2010, drawing on the Bay Area's rich tradition of hook-driven, guitar-led metal.

Hard rock and heavy metal band from San Francisco, California, formed in 2018, delivering the forceful, hook-driven sound the city's hard rock scene has long been known for.

Two Hundred Feet is a Los Angeles heavy metal and hard rock band formed in 2015, operating in the classic idiom of American hard rock and heavy metal with a sound rooted in the city's long tradition of arena-ready riff-rock.