In the Mormon community, July 24 is Pioneer Day. This remembrance recognizes the entry of Brigham Young and other pioneers of the Church of Jesus Christ of Latter-Day Saints (LDS) into the Salt Lake Valley for the first time on July 24, 1847. It was a turbulent time for the community, following the assassination of Joseph Smith and the subsequent expulsion of Mormons from Nauvoo, Illinois. Prompted by religious persecution, the demanding trek across the Great Plains, through the Wasatch Range, and into the arid Salt Lake Valley is a defining narrative of Mormon identity.