On 5/1/11 we found the parking area and turn around to be almost incorporated into a driveway across the road from the trail and the jeep trail that continued past the trail was an open class 6 road which we mistook as the road to the trailhead. We ended up hiking the road after it turned into a path/trail which was nice but without views. There is a small pull over on 3A just north of the intersection that is sometimes used for parking. We will try the actual trail another day.
Found the trail. Had to go a bit further up the class VI road. Drove as far as possible then walked on road. Trail marking on the right. Good description. Parking is pretty much none but could get a small vehicle out of the road.
I remember that road being quiet narrow and that the only way to park anywhere was at the side of the road. I hope you enjoyed Plymouth Mountain. That peak had some good views.