Tromen, Dormant stratovolcano in Neuquén Province, Argentina
Tromen is a dormant stratovolcano in Argentina's Neuquen Province, rising to about 4,100 meters with a main crater roughly 500 meters wide at the summit. Nine smaller cinder cones are scattered around the peak and belong to the same volcanic system.
The volcano was active in historical times, with a documented eruption in 1751 and another in 1822. Geological studies show that its activity shifted between explosive and effusive phases over time.
Local Mapuche and Pehuenche communities know this mountain as Tomen or Punmahuida, names that come from their own language and reflect how deeply the volcanic landscape is woven into their identity. Both names are still used today and appear on regional maps alongside the Spanish version.
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.
At the base of the volcano lies the Laguna del Tromen, a lake with acidic water that nonetheless serves as a breeding ground for many water birds. The lake's unusual chemistry, shaped by the volcanic ground, creates conditions rarely found at such elevations.
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