Caleta Coloso is a small coastal settlement located approximately 15 km south of Antofagasta, accessible via Ruta 1 (Avenida Jaime Guzmán).

It sits at the mouth of Quebrada Jorgillo on the Antofagasta Region coastline and serves as both an industrial port and an artisanal fishing cove.

The port facility, known as Puerto Coloso, is owned and operated by Minera Escondida Ltda and is primarily used for loading copper concentrate, handling roughly 850,000 tonnes of cargo annually.

The terminal accommodates vessels up to 192 m in length and 45,000 DWT with a maximum draft of 11. 5 m.

The surrounding terrain features notable Pleistocene marine terraces, including an intermediate terrace at approximately 30 m above sea level at the mouth of Quebrada Jorgillo, and an older, more elevated terrace at roughly 70 m that has been attributed to a Pliocene transgression.