Gregorio del Pilar, Ilocos Sur

The town lies among the western hills of the Cordilleras in the interior eastern portion of the province of Ilocos Sur. It is bounded in the north by the town of San Emilio, Quirino in the east, Sigay in the south and Salcedo in the west. Its 7 barangays and sitios are connected by winding foot trails and seasonal rugged roads. The town is likewise endowed with natural scenery and wonders such as the payoh or rice terraces, pristine waterfalls, and the distinctive peak of Mount Tirad. There are also trails crisscrossing Tirad Pass, which were built through polo y servicio (forced labor) during the Spanish Period.

In the 2015 census, the population of Gregorio del Pilar was 4,875 people,[3] with a density of 120 inhabitants per square kilometre or 310 inhabitants per square mile.

The inhabitants are Igorots, but belong to the Bag-o ethno-linguistic group. This mixture of Ilocano and Igorot intermarriages speak the Kankanaey language but can speak and understand the dialects of their neighboring towns. Many have already acquired college education and some serve the government and private institutions.

• Tirad Pass National Park and Shrine of Gen. Gregorio del Pilar (Barangay Dapdappig)
• Sibol Hot Spring and Swimming area (Barangay Bussot)
• Mt. Tirad Pass Summit and Mt. Peg-an Camping site (Barangay Bussot)
• Tirad Pass Museum and handicraft center (Poblacion Sur)

On December 2, 1899, American forces, mostly of the 33rd Volunteer Infantry Regiment under Major Peyton C. March, prepared for an assault of the Filipino forces fortification under the Command of General Gregorio del Pilar. On the narrow trail of Tirad Pass, the Filipino soldiers watched as the enemy began to move up the trail. On around a few hundreds yards above the pass, General Gregorio del Pilar, with his staff and accompanied by two civilians from Sitio Mabatano, spotted the American forces through his spy glass as they were starting to move. But as he watched, he noticed that the American forces broke formation and instead sent a messenger on horse back with a white banner. As the messenger was coming near the fortification of Filipino forces, the sound of a gun was heard and the messenger fell. The American forces divided into three separate groups. One group followed the trail towards the pass.

Another group ascended the hill facing the Filipino soldiers stationed in the pass. The third group, led by a Filipino from the lowlands named Januario Galut, made their way up unnoticed through the old trail which was hastily barricaded by felled trees a few days before the American forces arrived. This old path lead to the place where General del Pilar stood watching. As the American forces dispersed, the general ordered the two civilians, Tucdaden and Abeng to proceed to the trenches and deliver the breakfast of the Filipino soldiers. All of a sudden continuous gunshots were heard continuously and went unabated for several hours. General del Pilar was shot and killed.

• List of renamed cities and municipalities in the Philippines

• Act renaming the town of Concepcion to Gregorio del Pilar
• Gregorio del Pilar Profile at PhilAtlas.com
• Pasyalang Ilocos Sur
• Philippine Standard Geographic Code
• Philippine Census Information
• Local Governance Performance Management System