Turn onto the John Weickert Farm Lane and park near the barn without blocking anything in. Walk behind the barn and simply follow the treeline north (going away from the barn and the farmhouse and look right). There isn't much of a trail back to the DA rock. It is just a short walk from the barn as you follow to the west or left of the treeline. There is almost always an American flag or two on the sides of the rock which you can see it from a distance. The obelisk looking monument to the 35th Pa Infantry can be seen looking to your left , looking to your west and north.
It can get pretty wet for a short distance behind the barn. If you are driving from Little Round Top, as you head north on the Wheatfield road, the John Weickert Farm lane is to your right. Do not turn left heading towards Devils Den on Crawford Avenue.