I finally had a chance to do this a month or so ago. I stopped and asked for directions, and it turns out that the trailhead starts off of Madigan street, just north of 6th street. You'll know you're in the right place because there's a No Parking sign on the right side of the street. You can hear a little brook and walk through a small portion of the yard of the home at the end of the block, right past their swing. There actually was a trail sign at the trailhead, but so old and faded that it couldn't be read.
The trail was blazed in orange (nowhere near maintained, but better than a bootlegger's trail). It made for a nice climb up, maybe a half mile and 20-30 minutes. It definitely gives a good view of Berlin. Also has some nice cliffs on the way up if you're into rock climbing. Up at the top (didn't have my camera), there was a plain cross memorial which I would guess is probably from a teenager who had a fatal accident. There was also a small satellite dish which I would guess is some sort of cell repeater? Anyway I ended up just taking the ATV trails down and then walking through town back to the car, as the trail was slightly slick and too treacherous to go back down safely. Don't know that it's a trail I'll take again, but the ascent was fun.