Drive east from Presidio or south from Marathon to Big Bend and take the Grapevine Hills road to the trailhead.
This rock formation is a result of volcanic upheaval millions of years ago. The balanced boulder frames Nugent peak in the distance. You need to walk this trail and make a short climb up the mountain in the dark with a light to capture this easterly facing landscape at sunrise. I've been here 4 times and only seen one other photographer here at sunrise, so you'll probably have the whole area to yourself.