Thats awesome, father son time is priceless.
I'm sure what you worked on helped, but don't forget he is a year older, stronger, a little more coordinated, learning to use his body. Is he in other sports, soccer??
Not sure what race has to do with it. Our little local hill has every one on it, especially Eastern Indian people. What is sometimes cool is hearing them talk about this is their 1st time actually touching snow!!! It's man-made early in the season around here.
Enjoy the father son time, they grow fast. From a father of now teenagers. Sappy moment but you will forever remember these times and more to come. sappy over.