In this group is located the so-called Intermediate Terrace, as well as an open plaza where the site is currently accessed after clearing the moat, which is achieved by crossing a pre-Hispanic bridge. The East Plaza is surrounded by structures I to the south, II to the west, III to the east and IV to the north. Two late structures in its interior break with the original design of the plaza.

Structure I: Composed of two levels of rooms. At the height of the second roof, two tall masonry towers rising 15 m, characteristic of the Río Bec style, can be seen at the ends.

Structure III