A man is being chased into the woods by an evil king. The king has stated the man will not be chased once he is leaving the forest. The king is slightly mad, but knows the entire forest is too long for the man to keep outrunning him and his guards, who are on horse back. That is, before the man reaches the end of the forest they will have caught up with him.
How long does the man have to run for the king and his guards to stop chasing him?
It's my first (semi) riddle; I just felt like posting it. I hope these 'joke' kinds of riddles are allowed.