The west and the area that is now Utah was quite well known at the time, as fur trappers, missionaries, and explorers had been traveling to the area for several years. After hearing about the Rocky Mountains and the Great Salt Lake area, Joseph Smith declared that the saints would find peace there. After the persecution was so great that it caused his death, the saints did move there, following the vision and direction of Brigham Young as well as maps made by these early western explorers.
Utah.
Utah was settled by Mormons.
The Mormons were searching for a place where they could practice their religion in peace and found that place in Utah.
Mormons traveled west in either a conestoga wagon or handcart and settled in Utah.
Mormons settled much of the west. Church headquarters was built in Salt Lake City, but hundreds of towns all over Utah, Idaho, Wyoming, Arizona, Nevada, and California were settled by Mormons.
Many of what are now the Western United States were settled by "Mormons." You may be referring to Utah, however, which was the primary destination of the move west.
Mormons founded Salt Lake City, Utah, the capital of Utah. Actually, they founded the whole state of Utah...
The Mormons were receiving massive persecution, being moved from New York to Kirtland, to eventually Utah. So basically, they wanted a place to worship their religion in peace
The Mormons were seeking religious freedom. They had been harrassed and kicked out of previous settlements in Ohio, Missouri, and Illinois, so they went west to leave the United States (because at that time the area that is now Utah was part of Mexico).
Joseph Smith did not lead the Mormons to Utah at all. Joseph Smith was murdered in Illinois a year before the first group set out for the west. He did prophesy that eventually they would move to the Rocky Mountains, but he never did anything to lead them there.
Some say that the Mormons had to denounce polygamy before Utah became a state. This may or may not be true, as the plans to make Utah a state were in action before the Church officially denounced polygamy. Either way, Mormons arrived there in 1847, Utah became a territory in 1850, Mormons ended polygamy in 1890, and Utah became a state in 1896.
Utah is known for its snow, mormons, and beautiful national parks.