Take the east entrance to Glacier National Park, and get directions to Many Glacier Lodge.
We arrived at the Many Glacier Lodge to catch the boat to the Grinnell Glacier Trailhead. First boat was overbooked, so I wandered along the shoreline, the only photographer around. Was amazed at the relative calmness in the face of troubled weather the night before. The panorama presented itself - all I had to do was shoot verticals and stitch together.