Monte León National Park, Coastal national park in Santa Cruz Province, Argentina

Monte León National Park sits along 36 kilometers of Atlantic coastline featuring sandstone cliffs, multiple bays, and sandy beaches. The terrain shifts between rocky outcrops and flat sandbars that emerge at low tide.

Estancia Monte León belonged to the Southern Patagonia Sheep Farming Company Limited and was sold in 1920 to the Braun family, who ran sheep there until 2006. In 2000 Conservación Patagónica bought the land and passed it to Fundación Vida Silvestre Argentina, which donated it to the state in 2002. Law 25945, sanctioned on 20 October 2004, created the park, Argentina's first continental marine park.

The name comes from the Monte León estancia, a sheep farm run by the Braun family from 1920 until 2006. Earlier, Tehuelche groups used the coast for hunting and gathering, and guano was extracted here until 1930. Aboriginal people chewed calafate resin, which chroniclers linked to healthy teeth, and wild thyme is used in local cooking.

The park lies on National Route 3 at kilometre 2385, on the coast of Bahía Grande, 45 km southeast of Puerto Santa Cruz and 210 km north of Río Gallegos. The continental sector stretches from about 2 km northeast of Pico Quebrado to roughly 2.5 km southwest of the Cañadón Jack. Winds can gust up to 100 km/h, and average annual rainfall is about 250 mm.

The park holds Argentina's fourth-largest Magellanic penguin colony, with about 60,000 individuals. It is also the only place in the world where pumas are known to feed on penguins.