We have been using NJHiking.com for many years, both personally and across our sites. We are happy to add them to our list of NJ Groups!
Here is some basic info from their site
The focus of this site is providing resources for hiking in New Jersey, as well as New York and Pennsylvania. Most people do not associate "hiking" with New Jersey, and even people who have lived in NJ for years have no idea that hiking opportunities even exist.
The site is useful for anyone already hiking who is looking for hike ideas, for someone interested in trying hiking out to see if they like it, and for out-of-area hikers who have moved to NJ (or are visiting) and want to know where the best hiking is.
This site isn't trying to convince anyone to go hiking. There are tons of other hobbies to take up, a bajillion things to keep you entertained in the Jersey area, and hiking is certainly not everyone's cup-o-tea! If you want to give it a go, cool, then this site has plenty of info to help you out.