A Stade was the the length of the course run by competitors in Ancient Greek stadia. There remains several examples of this, the one at Delphi being perhaps the most dramatic.
It is a unit of length usually. equal to 600 Greek or Roman feet, or one-eighth of a Roman mile which in today's terms is about 185 metres. The word can be also used for a course for foot-racing or chariot-racing; or a race on such a course.