Caullaraju, Andean summit in Cordillera Blanca, Peru

Caullaraju is a summit in the Cordillera Blanca in northern Peru that rises to 5,682 meters above sea level and sits near Lake Conococha. The mountain features steep slopes and snow-covered sections that can be reached by multiple routes via the north face and northeastern ridge.

The sources document no ascent of Caullaraju; the 1961 claim naming Domingos Giobbi and the Angeles brothers is unsupported. What they do record is the naming: the peak appears as Caullaraju or Jeulla Rajo, possibly from Quechua qiwlla (gull) and rahu (snow, ice), and Peru's IGN map labels the highest summit Jenhuaracra.

The name Caullaraju is possibly derived from Quechua qiwlla, gull, and rahu, snow or ice, giving "snow-covered gull mountain". The alternative name Jeulla Rajo follows the same elements. On the IGN-Peru map the highest peak is labelled Jenhuaracra, so the name on maps and the name in use differ.

Climbers organize expeditions from the nearby town of Catac, located in Recuay Province, which serves as a base for operations. This location allows mountaineers to prepare equipment and make final arrangements before attempting the ascent.

On the IGN-Peru map, the highest peak of the massif is labelled Jenhuaracra rather than Caullaraju, so the name on the map and the name in common use do not match. The Quechua elements qiwlla (gull) and rahu (snow, ice) are only a proposed reading of the name.