On May 16, 1842, the second organized wagon train set out from Elm Grove, Missouri, with more than 100 pioneers. The party was led by Elijah White. The group broke up after passing Fort Hall with most of the single men hurrying ahead and the families following later. In what was dubbed "The Great Migration of 1843" or the "Wagon Train of 1843", an estimated 700 to 1,000 emigrants left for Oregon. They were led initially by John Gantt, a former U.S. Army Captain and fur trader who was contracted to guide the train to Fort Hall for $1 per person. The winter before, Marcus Whitman had made a brutal mid-winter trip from Oregon to St. Louis to appeal a decision by his Mission backers to abandon several of the Oregon missions. He joined the wagon train at the Platte River for the return trip. When the pioneers were told at Fort Hall by agents from the Hudson's Bay Company that they should abandon their wagons there and use pack animals the rest of the way, Whitman disagreed and volunteered to lead the wagons to Oregon. He believed the wagon trains were large enough that they could build whatever road improvements they needed to make the trip with their wagons. The biggest obstacle they faced was in the Blue Mountains of Oregon where they had to cut and clear a trail through heavy timber. The wagons were stopped at The Dalles, Oregon by the lack of a road around Mount Hood. The wagons had to be disassembled and floated down the treacherous Columbia River and the animals herded over the rough Lolo trail to get by Mt. Hood. Nearly all of the settlers in the 1843 wagon trains arrived in the Willamette Valley by early October. A passable wagon trail now existed from the Missouri River to The Dalles. In 1846, the Barlow Road was completed around Mount Hood, providing a rough but completely passable wagon trail from the Missouri River to the Willamette Valley—about 2,000 miles. Following persecution and mob action in Missouri, Illinois, and other states, and the martyrdom of their prophet Joseph Smith in 1844, Mormon leader Brigham Young was chosen by the leaders of the Latter Day Saints (LDS) church to lead the LDS settlers west. He chose to lead his people to the Salt Lake Valley in present-day Utah. In 1847 Young led a small, especially picked fast-moving group of men and women from their Winter Quarters encampments near Omaha, Nebraska, and their approximately 50 temporary settlements on the Missouri River in Iowa including Council Bluffs, Iowa.