What mountain was the site of Aztec child sacrifices to the rain god?

Mount Tlaloc was the mountain associated with Aztec child sacrifices to the rain god Tláloc.

The peak, known in Nahuatl as Cerro Tláloc, rises to about 4,100 meters east of the Valley of Mexico. The Aztecs considered mountains sacred because they were sources of clouds, springs, and rain. Tláloc was believed to dwell in mountain caves and control both life-giving rainfall and destructive storms.

During festivals dedicated to Tláloc and the Tlaloque, children were taken to sacred mountaintops, including Cerro Tláloc, and sacrificed. Chroniclers recorded that the victims’ tears were viewed as a favorable omen for abundant rain. The mountain also hosted an important shrine where rulers made offerings of precious stones, water-related objects, and other valuables.

A common mix-up is confusing Mount Tlaloc with Popocatépetl, Iztaccíhuatl, or Citlaltépetl, all famous Mexican peaks. Those mountains have major mythological or geographic importance, but Cerro Tláloc is the specific mountain linked to these rain rituals.