These funds enabled him to finance an especially well-equipped wagon train that included twenty horses, including two Morgan fillies and a Morgan stallion named Black Morrill; their combined value exceeded ,000.He also purchased two hundred head of red Durham cattle, which he planned to resell in California for profit.In 1858 some miners who had just returned from California so fired my imagination with descriptions of its glorious climate, wealth of flowers, and luscious fruits, that I was inspired with an irresistible desire to experience in person the delights to be found in the land of plenty.To finance the venture, Rose sold the majority of his assets, and after paying off his debts was left with ,000, then a considerable amount of money.John Udell, a 62-year-old Baptist minister kept a daily journal of the party's travels, recording the locations of their campsites, documenting their progress, and noting the availability of resources.
Udell, writing in his journal, explained his concern: "I thought it was preposterous to start on so long a journey with so many woman and helpless children, and so many dangers attending the attempt." According to Baley, the emigrants first learned of the recently surveyed road while visiting Albuquerque.
He subsequently financed a well-equipped wagon train that included twenty horses and two hundred head of purebred red Durham cattle.
He also acquired four large covered wagons and three yoke of oxen to pull them each wagon.
The Rose–Baley Party was the first European American emigrant wagon train to traverse the 35th parallel route known as Beale's Wagon Road, established by Edward Fitzgerald Beale, from Zuni Pueblo, New Mexico to the Colorado River near present-day Needles, California.
In 1858, a wealthy businessman from Keosauqua, Iowa, Leonard John Rose, formed the party after hearing stories from gold miners returning from California.