La Portada (Spanish: "The Gateway") is a natural arch on the coast of Chile, 18 km (11 mi) north of Antofagasta.

The La Portada Natural Monument covers an area of 31.27 hectares (77.27 acres), and its geomorphological features and remaining fossils stand out in the form of an arch.

It has a base of black andesite stone, around which are arranged marine sedimentary rocks, a stratum of yellowing sandstone, and layers of the remaining fossils of shells dating back 35 to 2 million years ago.

Between 2003 and 2008, the monument was closed due to a landslide of an important part of its cliffs, which required remodeling of the access route and its surroundings.

Occasionally one can also observe mammals such as the South American fur seal (Arctocephalus australis) or the common dolphin (Delphinus delphis).