The peak of the park was created as a national shrine in 1938 in honour of the heroes led by Gregorio del Pilar who fought bravely against the American soldiers during the Fil-American War. The 6,320 ha land area of Mt. Tirad in the province of Ilocos Sur was the stand of Filipino Revolutionary Forces against American in 1899. The shrine curves upward to the peak of Mt. Tirad. It was the site of battle record by international correspondents at the turn of the century. The apex of the Pass that Gregorio del Pilar and his men made a gallant stand against the American troops enable for President Emilio Aguinaldo to escape towards north. The young general, Gregorio del Pillar died during the bloody battle of Tirad Pass.