Traveling to ride bikes is great fun, but NJ is hard to beat.
I wonder about this as it pertains to MA. In Vietnam, I stumbled upon a pretty cool trail that is what you like, but on the TF map it was in that 10-30% popularity (for obvious reasons). Most of us use TF to find stuff, and the most technical stuff will never be popular. Think about all the stuff you like - how much of it would anyone find if they visited NJ and used TF to navigate? Probably almost none of it.
A place like Jungle would be the exception, I would say.