El Trench (or is Trenc, in Catalan) is a beach that is located next to the Spanish town of Las Covetas, Campos municipality, Mallorca. It is a natural protection area, near which are the Salinas del Trench, where the traditional fleur de sel is harvested.

The beach stretches from Las Covetas in the northwest to near Colonia de San Jorge in the southeast.

Since 2017 it has been part of the Es Trenc-Salobrar de Campos marine-terrestrial natural park.

Its name seems to come from the fact that the sandy area and its dune system constitute the natural dam that separates the Campos plain from the sea. Not in vain, behind the Trench the lower lands of the term extend, and flooded behind El Trench, the humid zone of Es Salobrar de Campos appears, the second most important humid zone of Mallorca, after Albufera de Alcudia.

In times of torrential rains, the torrents that drain the Randa mountain system and the Felanich and Santañí mountains to the south all converge at the bottom of the campanula plain, which, however, has no natural outlet to the sea. Thus, the water from the torrents, which only start in the event of floods, runs towards Salobrar, where the beds spread and flood the entire area. The accumulated water, having no outlet to the sea, sometimes breaks in the beach dune and the water evacuates towards the sea. This "break" (trenc in Mallorcan) of the water that occurs in the dune could have given the name to the beach, which is open and rectilinear, focused towards the west and southwest.