Star Tracks is actually a stack of more than 150 photos. Each photo was shot in a time lapse manner, then reassembled into the image above. The video below is made from combining all the photos in succession.
I started shooting just after the sun vanished over the horizon. Each exposure was 15 seconds with a 15 second rest in between each shot. The elapsed time from start to finish was around 75 minutes.
Location: Blue Ridge Parkway near Waynesville, NC.