Reckless driving is a hybrid crime but in essence it is a Class B misdemeanor.
Racing is not a felony in Texas unless you have multiple prior convictions for racing or you cause at least bodily injury to someone.
If stopped he would be taken to a juvenile detention center. Unless it was after hours or the weekend, I would think it would be highly unlikely he would be detained unless he had prior criminal history. "Detained" has a different meaning in the juvenile system. It is basically the equivalent of an arrest and booking into the detention center. Someone charged with this offense would likely be released to their parents. A judge or magistrate has to hold a detention hearing and determine that he should not be released in order for him to be detained. There'd then be a detention hearing every 10 days until the case was disposed or the judge released him. You just don't typically see juveniles detained for things like reckless driving.
Reckless driving and even racing are those types of crimes that have the potential for serious consequences but, in and of themselves are not major crimes, at least relatively speaking. They are both class B misdemeanors but in the juvenile system there are progressive sanction levels for punishment anyway. So the bottom line is that he would be looking at mandatory probation either level 2 or 3, the only distinction being whether it is deferred prosecution (level 2) or an adjudication (level 3.)
