Half marathon

I participated in half marathon today for the first time. Because I have never run more than 12km without rest before, I was concerned if I could finish the race. After starting the race, it was going well until 16km point. But it was very hard from the point to finish line. The running speed dropped sharply. Anyway I was relieved that I managed to run the whole way in the end. I don’t want to run such a long distance for a while.