[acabtp]

Yes, quite possibly. When in doubt, check the tax map... better than a wilful trespassing ticket. The landowners who post river property usually enforce it pretty vigorously. It can be pretty lame, but the law says that's their right in NJ.

There are many trout stocked rivers that have private stretches. IIRC, the private stretches don't get NJDFW stockings, just places with public access.