The odd name means "deserted valley" in the Ute language. It was discovered in 1854 by William Huntington, a missionary for Brigham Young. He was warned by the Ute and Navajo guides to abandon this place as it was believed by the two tribes to be haunted. The Paleo Indians inhabited the area as early as 6500 BCE but the pueblos were built probably between 500 AD and 1300 AD. You can visit the park year-round excepting on major holidays although summers can be brutally hot.