Huayhuash (possibly from Quechua waywash, weasel, or waywashi, squirrel) is a mountain range within the Andes of Peru, in the boundaries of the regions of Ancash, Lima and Huánuco. Since 2002 it is protected within the Cordillera Huayhuash Reserved Zone. Geography The Huayhuash range is 30 km long north to south and includes seven peaks over 6000 m including Yerupajá, which, at , is the second highest peak in Peru. Another notable peak, Siula (6,344 m) was made famous by mountaineer Joe Simpson …