Fredrick and Mary (Mackelprang) Jones came to Bluff in 1882 as part of the second group of pioneers called to the San Juan Mission, traveling with their two young sons, Aunt Jody Wood, and four other families by way of Halls Crossing on a difficult nine-week journey. While living in Bluff, their family grew by three children, and in 1886 they helped establish a settlement at the northeast base of the Blue Mountains that became Monticello. Fredrick served as the new community's first bishop for 21 years, and Mary served as president of the Relief Society for 23 years; she was remembered for unselfish service and generosity, and Albert R. Lyman recalled their home as a hospitable refuge while praising Fredrick as a farmer, builder, diplomat, and pioneer with strong practical sense. They had six more children in Monticello, and of their eleven children, nine lived to adulthood. Mary Jones' brother Samuel William Mackelprang, known as William, and his wife Adelia Terry Mackelprang came to Bluff in 1880 with five children among the original Hole-in-the-Rock pioneers, and Adelia gave birth to their sixth child in a wagon box soon after arrival. Two more children were born to them in Bluff, where William worked as a carpenter and freight hauler and Adelia used her weaving and sewing skills to make hundreds of velvet ceremonial garments for Native Americans in exchange for food. After moving to Huntington, Utah, in 1884, William died at age 39 three months after the birth of their tenth child, and Adelia supported the family by taking in laundry; all ten of their children lived to adulthood. Another of Mary's brothers, Christian Eric Mackelprang, came to the San Juan settlements in 1882 and helped establish the first orchards in Bluff.