Mormon corridor

Brigham Young, LDS Church president (1847–1877), personally supervised the founding of many outlying communities. Exploring parties were sent out to find settlement sites, and to identify sources of appropriate minerals, timber, and water. Western historian Leonard Arrington asserts that within ten years of the LDS arrival in the Salt Lake Valley, "...nearly 100 colonies had been planted; by 1867, more than 200; and by the time of (Young's) death in 1877, nearly 400 colonies."[5] These colonies had four distinct purposes: "...first, settlements intended to be temporary places of gathering and recruitment, such as Carson Valley in Nevada; second, colonies to serve as centers for production, such as iron at Cedar City, cotton at St. George, cattle in Cache Valley, and sheep in Spanish Fork, all in Utah; third, colonies to serve as centers for proselytizing and assisting Indians, as at Harmony in southern Utah, Las Vegas in southern Nevada, Fort Lemhi (north-central Idaho near the Lemhi Pass), and present-day Moab in eastern Utah; fourth, permanent colonies in Utah and nearby states and territories to provide homes and farms for the hundreds of new immigrants arriving each summer."[5]

At times, Young or his agents met incoming wagon trains of Mormon pioneers, assigning the groups a secondary destination to establish a new community. After a relatively brief rest in the growing communities of the Salt Lake Valley, the groups would restock needed supplies and materials, gather livestock, and travel on. In addition, new colonizers could be called from the pulpit. Young read the names of men and their families who were "called" to move to outlying regions. These "missions" for church members often lasted for years, as the families were to remain in their assigned area until released from the calling or given a new assignment. Colonizers traveled at their own expense, and success depended on appropriate supplies and personal resourcefulness, as well as uncontrolled variables such as water supplies and weather.

Several of these colonies could also have provided support for a second migration of the Latter-day Saints which might have become necessary due to pressure by the U.S. government, starting with the Utah War. Some settlements were associated with existing or prior towns, and many were abandoned once the threat of persecution decreased after the 1890 Manifesto, and the transportation system in the Western United States matured. The First transcontinental railroad was especially significant in reinforcing or altering settlement patterns.

After Young's death in 1877, successive leaders of the LDS Church continued to establish new settlements in outlying areas of the west. The Salt River Valley in western Wyoming, now known as Star Valley, was designated for settlement in August 1878, while Bunkerville and Mesquite, Nevada were settled in 1879 and 1880 respectively.[6] Communities were also established in eastern and southeastern Utah and western Colorado, primarily populated by LDS Church converts from the southern United States. Historians James B. Allen and Glen M. Leonard estimate that at least 120 new LDS-based settlements were founded between 1876 and 1879.[6]

Mounting legislation and prosecution of polygamists within the Latter-day Saint population in the United States led to additional expansion. In 1884, church president John Taylor encouraged groups of church members in Arizona and New Mexico to cross the border into Mexico, where church leaders had investigated settlement opportunities in earlier years. By the end of 1885, however, the Mormon colonists had been denied the opportunity to purchase land within Chihuahua, by order of the acting governor. While the colonists remained on rented land, negotiations between members of the LDS Church's Quorum of Twelve Apostles and Mexican president, Porfirio Díaz, were successful and legal barriers were lifted.[6] For his help towards the LDS settlers, the first Mormon colony in Mexico was named Colonia Díaz. This settlement was shortly followed by two additional communities, In March 1886, Colonia Juarez and Colonia Dublán were established, with other smaller settlements emerging in future years.

Taylor instructed Charles Ora Card of Logan, Utah, to investigate, and if possible, establish similar communities of refuge in the Canadian North-West Territories. Card led a small group of explorers into present-day Alberta in 1886 and selected a settlement site. In 1887, enough settlers arrived from northern Utah to establish the community of Cardston.[6] By 1895, many additional LDS-based communities had been established in nearby areas in the province, partially because of a labour contract with the Alberta Irrigation Company.[7]