This mountain is privately owned except for a few holdings of the Rockport Wildlife Management Area. Though the RWMA's property is only a fraction of the mountain, the USGS "Pohatcong" benchmark in the summit contour is within the wildlife management area's boundaries: Map
Upper Pohatcong Mountain is a hard-core peakbagger's mountain. Reaching the flat summit requires difficult bushwacking through pricker bushes and careful avoidance of private property. The mountain is viewless and does not even offer interesting rock formations or pleasing streams.
The only views from Upper Pohatcong are from several powerline cuts on the mountain and from a field just above the State Pheasant farm.
The reward of Upper Pohatcong is getting to see the pleasing agricultural area that it is located in.
I parked near the Wildlife Management Area parking lot near 927 Rockport Rd. It’s hard to see but there is a sign that says “Parking Area” so I assumed it was ok although I do recommend you use a car with a decent amount of clearance as there is a pretty big dip when pulling off or back onto the road. After parking I began bushwhacking up the mountain. I ran into a few faint woods roads on the way up to the power lines. I crossed and then had another short bushwhack to the high point. I retraced my steps back to the parking area. Not nearly as many thickets, briars and blowdown as there was approaching from the pheasant farm.
The toughest of them all, I made it as far as the second power line crossing and couldn’t figure out a way to not trespass. I started out at the Pheasant Farm and hiked up to the overlook. From there I followed a woods road up to the first power line cut and from there it was a gritty bushwhack. I eventually got to a plateau along the summit and after navigating around an impenetrable wall of blowdown and briars, found a road surrounded by yellow posted signs accompanied with barbed wire. I bushwhacked parallel the posted signs until I reached an intersection with O’Brian Rd. From there I couldn’t tell where to go next as there were a ton of sign postings along O’Brian Rd. I followed the road down the other side of the mountain for a bit but turned around because I couldn’t find an area where I wouldn’t trespass. I ended up backtracking and followed the sign postings down the other side of the ridge towards Rockport Rd where my car was but I didn’t find anything that way either. It was getting later and I decided to go back to my car without making the true summit. I’ll give this one to myself but will ultimately end up trying again someday to make the true summit, probably by trying a different route.
After reading all the reports, I was apprehensive about this walk. With the brambles and the No Trespassing signs. But it wasn't too awful. It was challenging with the brambles and that we didn't find much in the way of trails to follow. And it was hot and humid today. But we took our time.
Parked on state land near 927 Rockport Road and started on an ATV trail, but it quickly disappeared into the brambles. After that, made it across the powerline and a more-or-less direct route to the summit. No view from the summit. Less than 2 miles round-trip. We found a few No Trespassing signs, but one of my hiking buddies (works for the State of NJ wildlife division), confirmed we were on state property and could ignore the signs.