In the winter, the sun stays relatively low in the sky, so even in mid-morning the angled lighting creates beautiful texture. I took this shot in a frozen section of the Snake River in Grand Teton National Park. I tried to take the blue tone out but decided I preferred the picture this way. Blue implies cold, and it was definitely cold. I shot this from the road with a 100-400mm lens set to 400mm, and my settings were 1/3200, f/10, 640 ISO. It was very bright, and I could have lowered the ISO because I didn't need a shutter speed that fast even though I was handholding the camera. With modern digital cameras, however, 640 ISO is really the same in terms of noise as using 100 or 200 ISO.