Modern American Indian tribes were familiar with the area when Spaniards first arrived in the 17th century. The traditional Ute phrase for the Great Sand Dunes is Saa waap maa nache (sand that moves). Jicarilla Apaches settled in northern New Mexico and called the dunes Sei-anyedi (it goes up and down). Blanca Peak, just southeast of the dunes, is one of the four sacred mountains of the Navajo, who call it Sisnaajini (White Shell Mountain). These various tribes collected the inner layers of bark from ponderosa pine trees for use as food and medicine. The people from the Tewa/Tiwa-speaking pueblos along the Rio Grande remember a traditional site of great importance located in the valley near the dunes: the lake through which their people emerged into the present world. They call the lake Sip'ophe (Sandy Place Lake), which is thought to be the springs or lakes immediately west of the dunefield.