Huamashraju, Mountain summit in Cordillera Blanca, Peru.

Huamashraju is a pyramidal peak in the Cordillera Blanca, Ancash Region, rising to 5,434 meters with granite walls. Multiple climbing routes access the mountain, primarily on the northern face.

The first documented ascent was made on 15 May 1954 by J. Cabana and Arturo Soriano Bernardini via the southwest ridge. Their route established the mountain's climbing history.

The name Huamashraju is Quechua: wamash means "falcon" and rahu "snow, ice", giving "falcon mountain"; César Morales Arnao instead read wamash as "frightening", so "the snow that frightens". The alternative name Yanahuacra comes from yana (black) and waqra (horn), "black horn".

A one-hour taxi ride from Huaraz reaches Jancu village, where climbers establish their base camp before starting the ascent. This approach provides access to the main climbing routes.

The name Huamashraju may derive from Ancash Quechua wamash (falcon) and rahu (snow, ice), giving "falcon mountain"; linguist César Morales Arnao instead read wamash as "frightening", yielding "snow mountain that frightens". The peak also carries the names Wamashraju, Yanahuacra ("black horn") and Rajo Colta.