Mormon pioneer colonized towns clear across the west.
Ultimately, a thousand mile-long line of settlements were built from Fort Lemhi and Bear Lake Valley, Idaho, to the north, to San Bernardino, California, to the south. These settlements made up the so-called Mormon Corridor, along present-day 1-15 and U.S. 89-91
Other towns were located on an eight hundred mile long line as far west as Carson Valley (Nevada) and as far east as Fort Bridger (Wyoming). The Mormon Corridor plan had three specific goals. First, a convenient year-round route to Utah, especially during the winter, when South Pass and the Sierra Nevada mountains were shut down from snowfall. Second, it was planned that the settlements be but one day's travel apart for the safety and well-being of travelers. That goal was not quite realized, but the results were impressive. Third, it was designed to largely "lock out" settlers whose purposes might be antithetical to the Latter-day Saints.