Tancancocha (possibly from Quechua tanka fork, a deep bifurcation, -n a suffix, qucha lake, "lake of the bifurcation") is a mountain in the north of the Huallanca mountain range in the Andes of Peru at a small lake of that name. The mountain reaches an altitude of approximately . It is located in the Ancash Region, Bolognesi Province, in the districts of Aquia and Huallanca.
The lake named Tancancocha lies in the Huallanca District at , northeast of the peak.
References escale.minedu.gob.pe - UGEL map of the Bolognesi Province (Ancash Region) see Nevado Burro (NW)
Alfred J. Bodenlos, George E. Ericksen, Lead-Zing Deposits of Cordillera Blanca and Northern Cordillera Huayhuash, Peru, Geological Survey Bulletin 1017, see. sketch maps p.9-10