Young organized a
vanguard company to break the trail west to the
Rocky Mountains, gather information about trail conditions, including water sources and Native American tribes, and to ultimately select the central gathering point in the Great Basin. The initial company would select and break the primary trail with the expectation that later pioneers would maintain and improve it. It was hoped that the group could, wherever possible, establish
fords and
ferries and plant crops for later harvest. In late February, plans were made to gather portable boats, maps, scientific instruments, farm implements and seeds. Techniques for irrigating crops were investigated. A new route on the north side of the
Platte River was chosen to avoid major interaction with travelers using the established
Oregon Trail on the river's south side. Given the needs of the large volume of Saints who would travel west, church leaders decided to avoid potential conflicts over grazing rights, water access and campsites. In April 1847, Young consulted with members of the
Quorum of the Twelve Apostles who had recently returned from the British mission.
John Taylor,
Parley P. Pratt and
Orson Hyde brought money contributed by the English Saints, a map based on
John C. Fremont's recent western expedition, and instruments for calculating latitude, elevation, temperature and barometric pressure. Chosen members of the vanguard group were gathered together, final supplies were packed, and the group was organized into military companies. The group consisted of 143 men, including three enslaved African-American men, and eight members of the Quorum of the Twelve Apostles, three women, and two children. The train contained 73 wagons, one cannon, 93 horses, 52 mules, 66 oxen, 19 cows, 17 dogs and some chickens, and carried enough supplies to fully provision the group for one year. Young divided this group into 14 companies, each with a designated captain. Apprehensive of possible danger posed by
Native Americans, a
militia and night guard was formed under the direction of
Stephen Markham. On April 5, 1847, at 2 p.m., the wagon train moved west from Winter Quarters toward the Great Basin. With the afternoon start, they made three miles (5 km) and camped in a line a few hundred yards from a stand of timber. Journal records show that Young actively managed the journey, supervising details and occasionally giving reprimands when evening and Sunday recreation became rowdy or group members failed to complete their tasks. On one occasion, he chastised the camp's hunters "for being wasteful of flesh... killing more than was really needed." The camp was awakened by a bugle at 5a.m. and the company was expected to be prepared for travel by 7a.m. Each day's travel ended at 8:30p.m. and the camp was in bed by 9p.m. The company traveled six days during the week, but generally stayed in camp on Sunday to observe the
Sabbath. Some camp members were assigned specific tasks.
William Clayton was appointed company scribe and was expected to record an accurate description of their journey and the distance they traveled each day. Clayton collaborated with
Orson Pratt, a mathematician, and Appleton Harmon, a carpenter, to create a wagon-wheel odometer, or
roadometer. It showed that the company averaged between fourteen and twenty miles per day.
Apostle Orson Pratt was named the company's scientific observer. He made regular readings on scientific instruments, took notes on geological formations and mineral resources, and described plants and animals. Journals kept by both Clayton and Pratt have become valuable resources for historians of the Mormon trek west. Clayton made his notes and measurements available to other emigrants in his ''
The Latter-Day Saints' Emigrants' Guide''. Women of the company also performed vital tasks along the way. While much time was spent on traditional activities such as cooking, sewing, and tending children, several women served as scribes and diary keepers. Harriet Page Young, wife of Lorenzo Young, was the first woman selected for the company. She was in ill health and Lorenzo Young feared to leave her and their young children behind. The other original women of the company, Ellen Sanders Kimball, wife of Heber C. Kimball, and Clarissa Decker Young, wife of Brigham Young, were asked to accompany the group to look after Harriet Young and keep her company. The three women were joined by a larger group of women church members from
Mississippi who merged with the main party at
Laramie, Wyoming. The first segment of the journey, from Winter Quarters to
Fort Laramie, took six weeks, with the company arriving at the fort on June 1. The company halted for repairs and to reshoe the draft animals. While at Fort Laramie, the vanguard company was joined by members of the
Mormon Battalion who had been excused from service due to illness and sent to winter in
Pueblo, Colorado. Also traveling in the new group were church members from Mississippi who had taken a more southern route toward the Great Basin. At this point, the now larger company took the established Oregon Trail toward the trading post at
Ft. Bridger. At a difficult crossing of the Platte, just before encountering the
Sweetwater River, the company made use of their portable boat and were able to cross with comparative ease. Seizing the opportunity to both help future travelers and increase the cash available to the migration, nine men under the direction of
Thomas Grover were left behind to construct and operate a ferry at that location. Missourians and other travelers at the river paid the Saints $1.50 or more per wagon to help them cross. During the last week of June,
Sam Brannan, leader of the
voyage of the Brooklyn Saints, met the company near
Green River, Wyoming. He reported to Young about his group's successful journey and their settlement in what is today
San Francisco, California. He urged the vanguard company to continue on to California but was unable to shift the leader's focus away from the Great Basin. Young also met mountain man
Jim Bridger on June 28. They discussed possible routes into the Salt Lake Valley, and the feasibility of viable settlements in the mountain valleys of the Great Basin. Bridger was enthusiastic about settlement near Utah Lake, reporting fish, wild fruit, timber and good grazing. He told Young that local Indians raised good crops, including corn and pumpkins, but that there was ever-present danger of frost. The company pushed on through South Pass, rafted across the Green River and arrived at Fort Bridger on July 7. About the same time, they were joined by thirteen more members of the sick detachment of the Mormon Battalion. The vanguard company now faced a more rugged and hazardous journey, and were concerned about negotiating the passes of the Rocky Mountains. They had received conflicting advice, but Young chose to follow the trail used by the
Donner–Reed party on their journey to California the previous year. Shortly after leaving Fort Bridger, the group met trapper
Miles Goodyear, who owned a trading post at the mouth of the Weber River. He was enthusiastic about the agricultural potential of the large Weber Valley. During the trip through the rugged mountains, the vanguard company divided into three sections. After crossing the Green River, several members of the party suffered from "mountain fever" (probably
Colorado tick fever, which is carried by the
Rocky Mountain wood tick). Young himself became ill soon after meeting Goodyear. The small sick detachment lagged behind the larger group, and a scouting division was created to move ahead on the designated route. In July 1847, the first company reached the Salt Lake Valley, with scouts
Erastus Snow and Orson Pratt entering the valley on July 21. Pratt wrote:
...we could not refrain from a shout of joy, which almost involuntarily escaped from our lips the moment this grand and lovely scenery was within our view. The two scouts undertook a twelve-mile (19 km) exploratory circuit into the valley before returning to the larger party. The next day, larger segments of the valley were explored, streams and hot springs investigated and the first camp established in the Salt Lake Valley. On July 23, Pratt offered a prayer dedicating the land to the Lord. Ground was broken, irrigation ditches were dug, and the first fields of potatoes and turnips were planted. On July 24, Young first saw the valley from a "sick" wagon driven by his friend,
Wilford Woodruff. According to Woodruff, Young expressed his satisfaction in the appearance of the valley and declared "This is the right place, drive on." Today a
monument stands in the spot where he made this declaration. Young later reported that he had seen the valley, including
Ensign Peak, in a vision and recognized the spot. On July 28, Young established a location for the future
Salt Lake Temple and presented a city plan to the larger group for their approval. In August 1847, Young and other selected members of the vanguard company returned to Winter Quarters. By December 1847, more than two thousand Mormons had completed the journey to the Salt Lake Valley. Several hundred, including Young, returned east to gather and organize the companies scheduled for following years. Demographic estimates place 1,611 pioneers in the valley of the Great Salt Lake during the winter of 1847. The adult labor force, however, was quite small as a high percentage of the group, 53.2 percent were under the age of nineteen. Twenty five percent of the total were children under the age of eight. Each year during the Mormon migration, people continued to be organized into "companies", each company bearing the name of its leader. The company was further divided into groups of 10 and 50 with authority and responsibility delegated downward. ==Travel conditions==