With the sun lying on the western horizon, a heavy unit grain train is about to crest Ash Hill at its top, which is Squaw Summit.

Just as the sun is setting, a pair of DPUs on the rear of a heavy unit grain train crests Ash Hill at Squaw Summit, with the lava hills to the east forming a stark and forbidding backdrop.

UP 3901 East, a super-hot stack train detouring over the BNSF to avoid track work near Sweetwater, Texas, meets a westbound at Squaw Summit, the top of Ash Hill.