Tukumach'ay or Tuku Mach'ay is a mountain in the Paryaqaqa or Waruchiri mountain range in the Andes of Peru, about 5,350 metres (17,552 ft) high. It is situated in the Junín Region, Jauja Province, Canchayllo District. Tukumach'ay lies north-east of the Paryaqaqa, between the mountain Tunshu in the northwest and the lake Qarwaqucha in the southeast.