I missed this question but yes, I've done that. that's the desert run past the end of the pavement at Manuel Benevides. Then there is relatively easy dirt until you reach the wash at the base of the rise to the rim 1,500 above the Rio Grande at Santa Elena. There are a couple of tricky gates such that it pays to know about them in advance so you don't turn around needlessly. In my video below, right at the beginning I'm standing just east of the cleft in the ridge which is Santa Elena Canyon, splitting Texas and Mexico. Look in the upper left of the frame and you'll see the entrance to the canyon. This is 1,500 feet above the Rio Grand. Then I pan West to East; the highland at the end of the pan in the far distance is Chisos Basin in Big Bend National Park. At the beginning I pan past Terlingua and Study Butte, but you can't make them out in the vast expanse. I wouldn't attempt this without GPS tracks, but it can be done. In the above map, the left arrow is Manuel Benevides, and the right arrow is where I'm standing to make the video. Just east of the entrance to Santa Elena Canyon.