This is picture of the north side of Thunderbolt peak and the Thunderbolt glacier taken August of 2005. The NE Couloir arises from the left of the photo and the N Couloir is in the center. The high point of the photo is the lightning rod - the true summit is hidden behind. Also notice bergstrom is open on the N Couloir - in late season passing the berg can be the crux of the climb.