Grapevine Hills, a valley of boulders and monoliths. While the main attraction of this 2.2-mile hike at Big Bend National Park is an enormous rock window affectionately known as “Balanced Rock,” the view back towards the trailhead and down into the boulder valley is just as impressive. As I weaved in and out of boulders, I mused about how easily a mountain lion could lay in wait for me behind one of the boulders, if it wanted to. Taken on January 10, 2013 with a Nikon D7000 and 18-55mm f3.5-5.6 Nikkor lens. Click image to enlarge.