Westward Expansion Trails the Great Salt Lake in Utah. The Mormon Trail followed part of the Oregon Trail and then branched off at the fur trading post called Fort Bridger, founded by famed mountain man Jim Bridger. Heading south and following river valleys southwestward to the valley of the Great Salt Lake, Brigham Young led the first Mormons into present-day Utah during 1847. The Mormon Trail is 1,300 miles long and extends from Nauvoo, Illinois to Salt Lake City, Utah. The Mormon Trail was used for more than 20 years after the Mormons used it and has been reserved for sightseeing. The initial
Salt Lake County, Utah Affairs Hospital) are run by other organizations. Hospitals in the county include: The county has created "townships" and "community councils" in unincorporated areas, largely for planning purposes only. As of 2010, all of the townships are also census-designated places (CDPs), but the boundaries set by the Census Bureau and the county do not always coincide. People Salt Lake County, Utah Salt Lake County is a county located in the U.S. state of Utah. As of the 2010 census, the population was 1,029,655, making it the most populous county in Utah. Its county seat and largest city is Salt Lake City,