If you were called in 16 hours after you were back home, and were at home in your own bed overnight, I suspect you have very little to worry about. Might be a good idea to line up names and contact information on folks who saw you throughout the day at the tourney. If any are teachers or other parents, so much the better.
Yes, if the court's determine that you in fact ran away from your home, then the punishment is left within the sound discretion of the judge. All of the punishments listed are within the sound discretion of the juvenile court judge. However, based upon the facts indicated, it is doubtful that your actions would be deemed as a runaway, as there was no intent to runaway. There are also consequences for making false charges that your mother could face. Generally, for the first offense if found delinquent, there is a progressive punishment that is typically recommended. The probation officer could recommend some sort of pre-trial intervention program, which would require some sort of participation in program services for a period of time, then the charge will be dismissed. Then, typically, probation for a period of time is the next level of punishment, followed by detention for repeat offenses. The court does not have to follow any specific recommendation, but they usually do, unless there are some other circumstances. For instance, if you have a wanton disregard for parental authority, disrespectfully to your parents, skipping school or not attending school, then these are the sort of things that could impact any recommendation of the probation officer. Please seek the advice of local counsel.
This sounds like a relatively minor offense. However, technically, you can get in trouble for running away. You could get summoned to juvenile court and then a judge would hear your case. It doesn't sound like that will happen in your case though since you weren't gone that long.
I suggest you try to work things out with your mom.
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