Jatuncocha (possibly from Quechua hatun (in Bolivia always jatun) big, large qucha lake, "big lake") is a lake in the Cordillera Blanca in the Andes of Peru located in the Ancash Region, Huaylas Province, Santa Cruz District. It is situated at a height of comprising an area of . Jatunccocha lies in the Santa Cruz gorge between the peaks of Quitaraju in the north and Caraz in the south, northeast of a smaller lake named Ichiccocha (Quechua for "little lake").
The Santa Cruz Creek flows through the lake. It is a right tributary of the Santa River.
References wikimapia.org "Laguna Jatunqocha", retrieved on June 10, 2013 Ministerio de Agricultura, Autoridad Nacional del Agua, Inventario de Lagunas Glaciares del Perú, Huaraz 2014
pleinenature.free.fr Detailed map of the area showing "L. Jatuncocha" andix.com Map of a part of the Cordillera Blanca showing "L. Jatuncocha" escale.minedu.gob.pe - UGEL map of the Huaylas Province (Ancash Region)