Tromen, Dormant stratovolcano in Neuquén Province, Argentina

Tromen is a stratovolcano in western Argentina, in Neuquén Province, reaching 3,978 metres. It rises above the older caldera of the Volcán Negro del Tromen. At its northwestern foot, at 2,100 metres, lies Laguna Tromen, which covers about 4 km². The town of Buta Ranquil sits at the base of the volcano.

Tromen's two recorded eruptive cycles both postdate the 15th century AD. The first ran between 1400 and 1751, the second between 1820 and 1828; both involved low-risk volcanic phenomena. This chronology comes from historical reports analysed together with geomorphological data and a radiocarbon age.

The name Tromen comes from a Mapuche word that can mean soft, or derives from tomen, meaning cattail or bulrush. The volcano is also called Pun Mahuida, which would mean black or cloudy hill. The Mapuche name and the Spanish one are both used for the mountain.

The ground is covered in sharp volcanic rock, so sturdy boots are essential and careful footing is needed at all times. At this altitude, weather can shift very quickly, so it is always a good idea to carry extra layers and rain gear.

The lake at the foot of the volcano is called Laguna Tromen, lies at 2,100 m and covers about 4 km². The volcano's name may come from a Mapuche word meaning soft, or from tomen, reed; it is also called Pun Mahuida, black or cloudy hill.