In the 1800's, people who joined the Church of Jesus Christ of Latter-day Saints (the "Mormon" church) were encouraged to move from their native nations or cities to live near Church headquarters. Between 1830 and 1847, Church headquarters moved from New York to Ohio to Missouri to Illinois to Utah due to persecution and violence. The majority of Church members followed. Converts from Europe also moved to America and crossed the country to live near Church headquarters.
Church leaders asked members to stop gathering at Church headquarters around the year 1900. They are now asked to stay where they are and build up the Church there.
"The Mormons" as a Church never moved from New York to Idaho, because Idaho was never the location of Church headquarters. Individual Mormons may have done so, because farmland was generally more fertile in Idaho than in Utah.
Mormons immigrating to the United States from other countries (mostly Europe) had to check in at the New York immigration offices just like any other immigrant. It was and is the law that you must register with authorities when you move to a new country.
Mormons
Mormonism originated in New York. After a decade of preparation, which mostly took place in New York, the Church of Jesus Christ of Latter-day Saints (the "Mormon" church) was officially founded on April 6, 1830 in Fayette, New York.
The early settlers throughout much of Idaho, Utah, and Arizona were Mormons, and they still have high Mormon populations today. The first Mormons, however, settled in New York, Ohio, Missouri, and Illinois, which have pretty low Mormon populations today.
Church headquarters and members voluntarily left New York in 1831 to move to Ohio. This was because there was a large increase in converts from Ohio and it made more sense to move there then have all the converts travel to New York for meetings. This is the only place they left voluntarily, they were later forced out of Ohio, Missouri, and Illinois.
New York is 2 hours ahead of Sun Valley, Idaho. New York uses the Eastern Time Zone while Idaho while Idaho switches between the Pacific Time Zone and Mountain Time Zone.
Chicago is not a state. Chicago is a city. Iowa and New Mexico are states.
Palmyra, New York on April 6th, 1830.
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.
The Mormons moved west from New York to Ohio in 1831. They moved from Ohio to Missouri to Illinois, although not all at once so exact years can't be specified. They left Illinois to move to Utah in 1846.
Idaho borders Washington and Oregon to the west.
Alaska, Idaho , Maine ,Michigan , Minnesota, Montana , New Hampshire, New York, North Dakota , Ohio , Pennsylvania, Vermont,and Washington are the states that touch canada.