After 17 months of travel, Brigham Young leads 148 Mormon pioneers into Salt Lake Valley, resulting in the establishment of Salt Lake City.

Brigham Young was an American religious leader and politician. He was the second president of the Church of Jesus Christ of Latter-day Saints from 1847 until his death in 1877. He also served as the first governor of the Utah Territory from 1851 until his resignation in 1858.

Mormons are a religious and cultural group related to Mormonism, the principal branch of the Latter Day Saint movement started by Joseph Smith in upstate New York during the 1820s. After Smith's death in 1844, the movement split into several groups following different leaders; the majority followed Brigham Young, while smaller groups followed Joseph Smith III, Sidney Rigdon, and James Strang. Most of these smaller groups eventually merged into the Community of Christ, and the term Mormon typically refers to members of the Church of Jesus Christ of Latter-day Saints, as today, this branch is far larger than all the others combined. People who identify as Mormons may also be independently religious, secular, and non-practicing or belong to other denominations. Since 2018, the LDS Church has expressed the desire that its followers be referred to as "members of The Church of Jesus Christ of Latter-day Saints", or more simply as "Latter-day Saints".

Salt Lake Valley is a 500-square-mile (1,300 km²) valley in Salt Lake County in the north-central portion of the U.S. state of Utah. It contains Salt Lake City and many of its suburbs, notably Murray, Sandy, South Jordan, West Jordan, and West Valley City; its total population is 1,029,655 as of 2010.

Salt Lake City, often shortened to Salt Lake or SLC, is the capital and most populous city of the U.S. state of Utah. It is the county seat of Salt Lake County, the most populous county in the state. The population was 199,723 at the 2020 census, while the Salt Lake City metropolitan area has an estimated 1.3 million residents, the 46th-largest metropolitan area in the United States. It is also part of the larger Salt Lake City–Ogden–Provo combined statistical area, an urban corridor along a 120-mile (190 km) segment of the Wasatch Front with a population of approximately 2.8 million. It is the principal urban center within the Great Basin, along with Reno, Nevada.