I have ridden Mountain Ridge once.
It was just ok. I liked it because it was a quick and easy day trip - home before dark.
Very beautiful area at a high elevation (for PA).
Lots of windmills in the area. It was quite breezy, which was nice on a hot summer day.
This time of year, I hear it can be pretty brutal with the wind up there.
++ It is very affordable, well run, nice people, good parking, good camping, great views.
The main drawback is that the green trails are VERY rocky. Almost too rough to be fun for me.
Maybe if I were on a Big Red, it wouldn't be so bad, but on a 350X you are just on your clutch the whole time.
The people on the 4x4 automatic quads had no complaints. I can't remember what the dirt bike boys impression was.
IMO, If you are going to travel that kind of distance (from Long Island?), you might as well go a little further and ride the best (Hatfield McCoy, WV).
Start at Rockhouse Trail System and branch out from there. I even have a hookup for a cabin rental for you.
If you are dead set on Western PA riding for whatever reason, I would direct you to:
Mines and Meadows
http://www.minesandmeadows.com/
Allegheny National Forest
http://www.fs.usda.gov/recarea/alleg...ea/?recid=6124
or Wellsville, just over the Ohio line -- only if you are up for extreme difficulty level sketchy trails --
http://www.wellsvilletrails.com/
Some of my friends have been to Majestic. I have not. I'll ask around and try to get a ride report from there.
Hope this helps.