Lake McDonald Glacier National Park, last days of summer. In awe of the pure open beauty contained within the ancient ice carved peaks. 'Give a month at least to this precious reserve. The time will not be taken from the sum of your life. Instead of shortening, it will indefinitely lengthen it and make you truly immortal.' John Muir, naturalist and explorer (taken from a plaque in Glacier NP). I took a polarising filter on this trip and put it to reasonably good use with this shot, bringing out the mineral tones of the jagged rocks resting beneath the surface of the water, but still capturing the reflected outline of the mountains in the distance. It also enhanced the already very blue sky.