The Olympic Games initially lasted only one…
729 BCE to 718 BCE
The Olympic Games initially lasted only one day, and originally contained one event: the stadion (or "stade") race, a short sprint measuring between one hundred and eighty and two hundred and forty meters (five hundred and ninety and seven hundred and ninety feet), or the length of the stadium.
The length of the race is uncertain, since tracks found at archaeological sites, as well as literary evidence, provide conflicting measurements.
Runners had to pass five stakes that divided the lanes: one stake at the start, another at the finish, and three stakes in between.
The diaulos, or two-stade race, is introduced in 724 BCE, during the Fourteenth Olympic games.
The race is a single lap of the stadium, approximately four hundred meters (thirteen hundred feet), and scholars debate whether or not the runners had individual "turning" posts for the return leg of the race, or whether all the runners approached a common post, turned, and then raced back to the starting line.
A third foot race, the dolichos, is introduced in 720 BCE.
Accounts of the race present conflicting evidence as to the length of the dolichos; however, the length of the race was eighteen to twenty-four laps, or about three miles (five kilometers).
The event was run similarly to modern marathons—the runners would begin and end their event in the stadium proper, but the race course would wind its way through the Olympic grounds.
The course often would flank important shrines and statues in the sanctuary, passing by the Nike statue by the temple of Zeus before returning to the stadium.