Janq'u Llaqa (Aymara janq'u white, llaqa feather, "white feather", hispanicized spelling Ancollaca) is a mountain in the Andes of Peru, about high. It is in the Moquegua Region, Mariscal Nieto Province, Carumas District. It is southwest of Jach'a K'uchu and north of Kuntur Nasa.