Spegazzini Glacier, Mountainous glacier in Los Glaciares National Park, Argentina

Spegazzini Glacier flows east from the Southern Patagonian Ice Field to the Spegazzini arm of Lake Argentino. Its fractured ice descends between bare rock and a green ridge, ending in a vertical front 135 m high, the tallest in Los Glaciares National Park. The face is white and pale blue, cut by dark crevasses, with grey rocky debris along some edges.

The glacier takes its name from Italian botanist Carlo Luigi Spegazzini, who studied Patagonian plant life in the late 1800s. His name reflects the scientific exploration that brought European researchers to this remote corner of South America.

The glacier is named after Carlos Luis Spegazzini, an Italian botanist and mycologist (1858–1926) who was the first to study the local flora. Its ice feeds the Spegazzini arm of Lake Argentino, where tour boats from Puerto Bandera arrive; the Seco Glacier is visible nearby but does not reach the water.

The best way to reach this glacier is by boat from Puerto Bandera, which travels through the northern arm of Lake Argentino. Boats navigate around floating ice and icebergs before approaching the glacier wall.

The glacier is fed by the Mayo Norte and Peineta glaciers, and unlike most large glaciers in the region it shows no signs of retreat. Its front reaches 135 m, the highest in Los Glaciares National Park, and the Seco glacier can be seen from the Spegazzini arm without reaching the water.