Cerro Bayo, Mountain summit in Neuquén Province, Argentina.

Cerro Bayo is a mountain summit in Neuquén Province, Argentina, with a ski area on its slopes above Villa La Angostura. The ski area offers around 25 runs across different difficulty levels, served by several lifts that carry visitors up the mountain.

Cerro Bayo lies in the Andes about 9 km northeast of Villa La Angostura, within the Valdivian temperate rain forests near Lake Nahuel Huapi. In 2007 the mountain hosted the 2nd South American Ski Mountaineering Championship. In 2025 and 2026 the ski area began a modernisation plan, including a new quad chairlift with 11 towers and 90 vehicles replacing the Bosque chair, and a proposed year-round gondola linking the town with the mountain.

The ski area hosts events such as the torchlight descent and the gastronomic gathering Sabores que Unen, and freeride competitions have featured on its recent calendar. Food points operate at the base and at intermediate and high elevations, among them Oso Point, Parador Milquinientos and Oso Café. A ski school, a children's club and an adapted ski programme run by specialised instructors are part of the complex.

The ski season runs roughly from June through September, when snow cover is most reliable. Visitors coming early or late in the season should check current snow conditions before heading up, as snowfall can vary from year to year.

In 2007 Cerro Bayo hosted the 2nd South American Ski Mountaineering Championship, a competition in which skiers climb and descend the mountain under their own power rather than using lifts. The event is a lesser-known part of the mountain's record alongside its alpine ski area.