Osmore River

The Osmore River flows from the snow peaks of Chuqi Ananta mountains at 5,100 meters through valleys before reaching the Pacific Ocean.

Archaeological investigations across the Osmore River valley discovered more than 500 sites documenting human settlements extending over 10,000 years of history.

The river changes names along its course, starting as Moquegua in the mountains, becoming Osmore in the middle section, and Rio Ilo near the coast.

The water system irrigates agricultural lands where farmers cultivate grapes, corn, pepper, and cotton through developed canal networks in the lower sections.

The river's gradient of 3.6 percent spans 480 kilometers and drains 3,480 square kilometers of territory from mountains to coast.

Location: Moquegua Department

Location: Mariscal Nieto Province

Location: Ilo Province

GPS coordinates: -17.62225,-71.34258

Latest update: October 29, 2025 18:35