Contrahierbas, Mountain summit in Ancash Department, Peru.

Contrahierbas is a snow-covered massif in the Cordillera Blanca of the Peruvian Andes, inside Huascarán National Park, northeast of Hualcán. Its main peak reaches 5,956 m, and the massif also holds Yanarraju (5,435 m), Camchas (5,204 m), Cajavilca (5,409 m), Garhuanga (5,350 m) and Mateo (5,150 m). The photograph shows a jagged ridge of sharp peaks, snow over the upper and middle slopes, and a steep lower face of dark rock streaked with snow.

The massif's documented history centres on the Cajavilca silver mine, worked beneath the peak of that name since colonial times. In 2010 the Operación Mato Grosso opened the Refugio Contrahierbas near Cajavilca at 4,200 m, the fourth mountain hut in the Cordillera Blanca, reachable from Yanama.

The massif carries two Quechua names: Yanarraju, possibly from yana (black) and rahu (snow, ice, snow mountain), and Ruricocha, possibly from ruri (inside, interior, deep) and qucha (lake). The silver mine beneath Cajavilca peak has been worked since colonial times, and the Refugio Contrahierbas, opened in 2010 by Operación Mato Grosso, is the fourth mountain hut in the Cordillera Blanca, at 4,200 m near that peak.

The Refugio Contrahierbas, opened in 2010 by Operación Mato Grosso, stands near Cajavilca peak at 4,200 m and is reached from Yanama, the district capital. The massif is visible from Yanama, Piscobamba, San Luis and Chacas, and lies inside Huascarán National Park, northeast of Hualcán. Cajavilca's silver mine, worked since colonial times, lies below that peak.

The massif carries several named summits besides the main one, among them Yanarraju (5,435 m), Cajavilca (5,409 m), Garhuanga (5,350 m), Camchas (5,204 m) and Mateo (5,150 m). Below Cajavilca a silver mine of the same name has been worked since colonial times.