Olopa was originally inhabited by the
Ch'orti' but was invaded by tribes of the
Valley of Mexico. In April or May 1860, the
Capuchin Fathers, who had evangelized in the eastern of the country, donated to the inhabitants of the valley of Olopa an "Image of the Divine Shepherd" and constructed a church, made of straw. In March 1870, according to the Corregidor de Chiquimula Don Juan Peralta Baptist, Olopa was an indigenous town, with a pajiza church, and a resident Catholic Priest. On 1870-11-25 Don Juan Peralta Baptist authorized the establishment of Olopa as a municipality. ==Climate==