Rasac or Nevado Rasac is a mountain of the Cordillera Huayhuash
in west central Peru
, part of the Andes. It has a summit elevation of 6,017 metres (19,741 ft) (other sources: 6,040 m/19,816 ft) high. Rasac is a long, relatively squat mountain on the western edge of the Huayhuash range, across the glacier from the tallest peak in the range, Yerupaja. Although it´s a 6,000 metre mountain, Rasac´s broad profile is dwarfed by Yerupaja.
The name Rasac is derived from the Quechua for Toad.Rasac is considered to be the easiest 6,000–metre peak in the Huayhaush range, but it is still a challenging climb. The long, snowy West Face is divided by a series of buttresses, most of which have routes in the D range according to the International French Adjectival System.
The Right Buttress is still unclimbed. The East Face is almost all rock, most of which seems in the condition not to be climbed. There is allegedly a snow route of moderate difficulty (considered to be the normal route) up a gulley on this face that looked in the summer of 2007 to be totally out of condition.
Even if Rasac is overall the most climbed peak of the Huayhuash range, it remains a mountain climbed very rarely (less than a climb per year). The mountain lies in a remote and wild setting. Expeditions willing to climb in this area have to be fully self-sufficient in case of an accident or emegency.