Mormon pioneers These southern explorations eventually led to Mormon settlements in St. George, Utah, Las Vegas and San Bernardino, California, as well as communities in southern Arizona. By 1885, Mormon communities were being established in northern Mexico. The Mormon pioneers are celebrated annually on July 24 in the State of Utah, known as Pioneer Day. Salt Lake City also has the Mormon Pioneer Memorial Monument, where Brigham Young, Eliza R. Snow, and other Mormon pioneers are buried and where a memorial exists dedicated to all who crossed the plains to the Salt Lake Valley. Additionally, the Pioneer (characterized as "Pioneer Pete") is
William Clayton (Mormon) of marks and brands, holding both positions until his death. Clayton also worked as treasurer of the Deseret Telegraph Company and as secretary of Zion's Co-operative Mercantile Institution (ZCMI), a church based cooperative business enterprise. Private ventures included collecting debts, filing land claims, acting as a legal advocate, lending money, merchandising, farming, and mining speculation. Clayton was active in cultural activities in the Salt Lake Valley, particularly those associated with music. He died in Salt Lake City on December 4, 1879. He was buried at Salt Lake City Cemetery. William Clayton (Mormon) William H. Clayton (July 17, 1814 – December