Lake Pacucha, High-altitude lake in Apurímac, Peru.

Lake Pacucha lies 17 km from Andahuaylas in the Apurímac Region. Its water is warm, with temperatures between 15 °C in June–July and 19 °C in March–April, and nearly fresh. On the lake's east side stand the archaeological remains of Sondor, a Chanca culture site.

On the lake's eastern shore stand the archaeological remains of Sondor, a site of the Chanca culture. The Chanca people inhabited this area of the Apurímac region before the Inca expansion, and Sondor is the concrete trace of their presence beside the water.

A stone statue of a woman with a child and a lamb stands by the lake, facing the water. Legend names her Mama Petecc: an old beggar she fed told her to flee with her son and lamb and not look back; she turned at the thunder and was turned to stone. The lake's warm, nearly sweet water yields trout and pejerrey for local fishermen.

The dry season from May through October provides the best weather for fishing, watching birds, and walking trails along the shoreline. During these months the paths remain more accessible and conditions are more reliable for outdoor activities.

Fishermen use traditional night fishing techniques to catch a local fish species called Jahuaco in the cold waters. This handmade method has been part of local life and livelihood for generations.