Frontier Celebrations Pioneer Day is a wonderful celebration, especially in communities that honor the legacy of pioneers and settlers. Pioneer Day is an official holiday celebrated in Utah, and in regions of the surrounding states originally settled by Brigham Young and the first group of Mormon pioneers into the Salt Lake Valley on July 24, 1847. The Latter-day Saints settled after being forced from locations in the eastern United States. On Pioneer Day, some Latter-day Saints walk portions of the Mormon Trail or reenact entering the Salt Lake Valley by handcart. While the holiday... Read more