Huaraz is one of twenty provinces of the Ancash Region in Peru. It was created on August 5, 1857, during the presidency of Ramón Castilla. …Huaraz is one of twenty provinces of the Ancash Region in Peru. It was created on August 5, 1857, during the presidency of Ramón Castilla. Geographically, the province is located over the Callejón de Huaylas and the western slopes of the Cordillera Negra.