Ventisquero negro, Dark glacier at Mount Tronador base in Nahuel Huapi National Park, Argentina

Ventisquero Negro is a glacier located at the base of Mount Tronador in Nahuel Huapi National Park, distinguished by its dark brown coloring caused by accumulated sediment and rock debris. The ice mass extends across the lower mountainside and creates a substantial frozen landscape that dominates the terrain.

Ventisquero Negro is one of the fourteen glaciers of Cerro Tronador, a 3,478 m peak in Nahuel Huapi National Park whose name comes from the roars of falling snow and ice blocks. The glacier is fed by ice avalanches that break off from the Manso glacier about 700 m above it on the mountain. It lies at roughly 1,000 m above sea level and is described as receding.

Scientists regularly study this glacier to understand climate patterns and environmental changes in the Southern Andes mountain range of Patagonia.

The glacier lies about 1,000 m above sea level at the foot of Cerro Tronador, reached from the Pampa Linda area inside Nahuel Huapi National Park. A marked trail leads to a viewpoint over the meltwater pool; the terrain is uneven and cold, so wear sturdy footwear and warm layers.

The glacier's dark colour comes from sediment it picks up along its course, which sets it apart from the white glaciers of Patagonia such as Perito Moreno in Santa Cruz Province. It is one of fourteen glaciers on Cerro Tronador, a 3,478 m peak named for the roars of falling snow blocks.