Si-Te-Cah

According to Paiute oral history, the Si-Te-Cah or Sai'i are a legendary tribe of red-haired cannibalistic giants, the remains of which were allegedly found in 1911 by guano miners in Nevada's Lovelock Cave.

Furthermore, the Paiute creation story tells of "beautiful giants" who once lived between the Sierra Nevada and the Rocky Mountains. After giving birth to a disfigured child, the giants treated the child so poorly that the Great Spirit responded by making the land hot and desolate and allowing enemies to conquer the giants. Only two giants survived: Paiute and his wife, both of whose skin became brown from eternally living in the hot desert.

Origins
Adrienne Mayor writes about the Si-Te-Cah in her book, Legends of the First Americans. She suggests that the 'giant' interpretation of the skeletons from Lovelock Cave and other dry caves in Nevada was started by entrepreneurs setting up tourist displays and that the skeletons themselves were of normal size. However, about a hundred miles north of Lovelock there are plentiful fossils of mammoths and cave bears, and their large limb bones could easily be thought to be those of giants by an untrained observer. She also discusses the reddish hair, pointing out that hair pigment is not stable after death and that various factors such as temperature, soil, etc. can turn ancient very dark hair rusty red or orange.