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
John Taylor (Mormon) said to have received the 1886 Revelation. Photographs of the original document exist, which restated the permanence of the "New and Everlasting Covenant," which some consider to be referring directly to the practice of plural marriage; the validity of the revelation is rejected by the LDS Church, which does not consider it to be authentic, but it is used by Mormon fundamentalists to justify the continued practice of polygamy. Taylor died on July 25, 1887, from congestive heart failure in Kaysville, Utah Territory. Taylor was buried at the Salt Lake City Cemetery in The Avenues, Salt Lake City, Utah. For