The season is as long as you want it to be. Our "club" starts practices the first weekend after Thanksgiving. It works for us, but as Beeson said they start earlier yet. Which now a few of us from our club will be doing on our own. You can take a week off here and there or you can just end your season when it feels right for your child. However, the wrestlers I know that are hungry for State just keep on hittin it week after week.
This year a few of us from our club will be doing a little freestyle and some summer wrestling and camps. There are a few wrestlers out there, I'm not gonna mention any names (Jacob Beeson, Levi Green) that have the bar raised so high that we have to keep working in between baseball practices and football games just to keep the hope alive. So, the season can be as long as you want or as short as you like. The deciding factor is state and if your wrestler wants it.