Cerro de Arcos, Mountain summit in southern Sierra, Ecuador.

Cerro de Arcos is a windswept rock formation on the high páramo of Ecuador's southern sierra, on the border of El Oro and Loja provinces. It stands at 3,700 m on the plain between the Cordillera de Chilla and the Cordillera de Timbayacu. Towers, columns and several arches eroded by wind and rain cover about 300 m².

Cerro de Arcos is a rock formation, not a mountain massif, on the high plain between the Cordillera de Chilla and the Cordillera de Timbayacu, on the border of El Oro and Loja provinces at 3,700 m. Its towers, columns and arches were cut by rain and wind erosion, and the whole group covers about 300 m².

The name Cerro de Arcos means "Hill of arches" in Spanish, taken from the natural arches eroded by wind and rain. The formation lies on the border between El Oro and Loja provinces, on the plain between the Cordillera de Chilla and the Cordillera de Timbayacu. Nearby settlements include Bellavista and Sabadel, with Zaruma and Manu as the closest towns.

Visitors can reach the summit by following a marked hiking trail that starts from nearby villages. The hike is best done during drier months when trail conditions are more stable.

Cerro de Arcos covers only about 300 m², a compact cluster of towers, columns and arches on the plain between the Cordillera de Chilla and the Cordillera de Timbayacu. Its name means "Hill of arches" in English, and the nearest villages are Zaruma and Manu.