How old can you be to enter a Junior golf tournament?

I can’t find the how old you can be to enter a Junior golf tournament?
I’m 17
Also what do you think you would need to shoot to win one of these tournaments?

17 is a little old to be wondering about kiddie tournaments, which is really what junior tournaments are more intended for, and a little late getting into the game to be worrying about winning them. i think 16 is the max for junior competitions, once over that age players are to join the regular amatuer ranks, but you need to check with junior tournaments you are considering to know for sure.