Momiji-no-sato half marathon

It was very cold in the early morning but turned very hot during the race. I could built up the pace through the way, and the pace during each 5km was 4'59", 4'53", 4'44" and 4'41" per every one kilometer. However, just before the goal (around 20km), I felt a pain in the calves, and then, I kept down the pace to the goal. The finishing time was not so bad for me, and I fully enjoyed a fall good day.