[1][2] Jozef Martinka suggested the origin in Ruthenian vyharj / vyhar (Slovak: výhor) - a burned forest with a grouping suffix -ať.
Vihorlat is bordered by the Eastern Slovak Lowland (Východoslovenská nížina) in the south and the west.
The Beskidian Southern Piedmont (Beskydské predhorie) separates Vihorlat from the Bukovské vrchy mountains and Laborecká vrchovina highlands in the north.
The largest lake in the mountain range is Morské oko, which is situated at 618 m AMSL.
Kyjovský prales, a primeval beech forest in Vihorlat Mountains, was proclaimed by UNESCO to be a World Heritage Site on June 28, 2007, because of its comprehensive and undisturbed ecological patterns and processes.