The west chamber almost mirrors the one to the east, but it extends about 10' further to the north and south, with each end widening into a rounded space.
At the north end, a large, shallow bowl rests on the ground, containing and surrounded by fragments of shattered rock. This area, like the other rooms, is lit with a fire bowl set into a nice in the wall. The south end is in darkness -- it, too, has a nice with a fire bowl in it, but the fire is not lit.
A basalt stela leans against the wall in the south area, a three-legged wooden stool standing beside it. The stela is about 5' tall, with semicircular eyes and a downturned mouth carved into the upper part. Below that is a carving of a lumpy, amorphous creature walking to the right alongside a large serpent and a naked, androgynous human form. A strange diagram of intersecting lines and hexagons has been carved into the lower part.