The stadium dates to the 2nd century B.C. which is 6 meter wide and was allocated as a promenade area was open to the sky. The building is adjacent to the east side of the palaestra of the lower gymnasium and is connected to the door of the palaestra.
The north side of the stadium was built for the spectators. There is stoa to the rear of the seats, facing south which was used for practicing before the games. The stoa, the promenade area and the rows of seats were all reached by stairs on the west side.
In the Hellenistic period, the bases in the front row were used for as the starting points for the races. Those in the rear row are the bases of a more grandiose exit gate, built in the Roman period.