The Acarai Mountains (also, Akarai Mountains) (Portuguese: Serra Acaraí; French: Montes Acaraí) are a wet, forested highland region of low mountains located in the southern part of Guyana. This range lies along the common border between Guyana and Brazil. The Acarai Mountains is one of four mountain ranges in Guyana, the others being the Imataka, Kanuku and Pakaraima mountains.