|The area that is now Sheridan County has been characterized as harsh and treeless, only slightly touched by the Great Dakota Boom ofthe 1880s. Only a few settlers, primarily ranchers, came during this period. By 1890, what is now Sheridan County had no railroads or townsites. Little had changed by the time James Clark and his wife, Mae Estella Robbins, decided to homestead in what was then part of McLean County in 1899. 1 Originally, the homestead claim was for the Southeast quarter of Section 8, Township 146, Range 74 West. The Clarks moved to the area at the beginning of the Second Dakota Boom (1898-1915).