I was in Glacier National park for a few days and stayed one night in a little cabin park just north of St Mary, on the eastern edge of the park. The cabins were pretty isolated, but I was able to use the porch as a spot to park my tripod and let it take 30 second exposures for 3+ hours. After running them through Photoshop, this is the result. The images are stacked on top of each other to create the star trails. This is my first attempt at this kind of astrophotography, so I may redo this picture at some point.