La Hoguera is a heavy/thrash metal band from Santo Tomé, Santa Fe, led by vocalist and guitarist Eduardo "Negro" Cortéz, whose lyrics draw on surrealist imagery mixed with social commentary. Their album "Al acecho" was recorded at Crazy Rabbit Studio in Buenos Aires and released on March 25, 2023, presented live at La Moreno venue in Santa Fe.

La Pleve is a thrash metal band from Iquitos, Peru, who drew lyrical inspiration from Amazonian society and the natural world around them. The band released their debut EP "Iritama Arukaka" and full-length "Sonido de Lupuna" in 2021, before splitting up. Their work stands as a rare example of thrash metal rooted in the Loreto region of the Peruvian Amazon.

La Sombra del Caminante is a groove/thrash metal band from Bogotá, Colombia, formed in 2018 and releasing through Thrashing Colombia. The band explores themes of life, philosophy, and storytelling, and released their debut full-length "Androides y manzanas" in 2020 followed by an EP in 2023.

Lacktor are a death/thrash metal band from Antofagasta, Chile, whose name is drawn from the Kunza word for "famine" — a language spoken by the Likan Antai, a pre-Hispanic civilization of the Atacama region. Combining old-school Swedish death metal with thrash, crust punk, and traces of black metal, the band delivers lyrics in Spanish addressing famine, social criticism, and historical colonialism. They released their debut full-length Hambruna in 2019 through Organic Waves Studios, followed by Legado in 2022.

Lascados are a thrash metal and crossover hardcore band from Anápolis, Goiás, Brazil, who have been active since the early 2010s. The band has released several full-lengths through their Bandcamp page, including Humanos Pertubados Questionáveis, Cotidiano Duro de um Trabalhador, and Chinese Lasquera. Expanding from a power trio to a four-piece in 2025, they remain one of the few metal acts operating out of Anápolis.

Last Conscious are a death/thrash metal band from Santa Luzia, Minas Gerais, Brazil. The band has released recordings including Psychological Torture, Damn Thoughts, and Political Loathing, drawing on the aggressive traditions of Brazilian extreme metal. Their lyrical content spans psychological and political themes.

Lazaro is a thrash metal band from Rafael Castillo, Buenos Aires, founded by guitarist Jorge Moreno following his departure from the long-running Argentine thrash act Serpentor. The band carries on the tradition of socially and politically charged thrash metal from the Greater Buenos Aires underground scene.

Legacy of Kain is a groove and thrash metal band from Curitiba, Paraná, Brazil, featuring guitarists Angelo Torquetto and Karim Serri, both veterans of bands including Doomsday Hymn and Desertor. The band released their debut album I.N.V.E.R.S.O in 2017, sung entirely in Portuguese, followed by Paralelo XI in 2019, and has toured Argentina as part of regional metal festival circuits.

Legion is a thrash metal band from La Plata, Argentina, whose lineup includes Nicolas Liendo on guitar and vocals, Rafael Garritano on guitar, Sergio Carrizo on drums, and John Williams on bass. Their debut album "Gran Mal" was recorded and mixed at Dormir Sucio studio in Berisso during 2016 and released in 2017. The band draws on the tradition of Argentine thrash acts such as Hermética and Horcas.