Additional images can be viewed here.
Yellowstone in winter is one kick-ass location. Unfortunately (or fortunately for me), the National Park Service only allows a small number of visitors into the park in winter. I consider a week in Yellowstone a "bucket list" accomplishment. The image was captured on a small bridge over the Yellowstone River less than a mile from the Grand Canyon of Yellowstone.
I took a number of pictures of the river from different angles focusing primarily on captures that showed more angular flow. In the end, I settled on a straight-on, "in-your-face" composition because it most accurately reflected the photo experience of the location.
Using a polarizing filter, I played with the amount of polarization. I tried to strike a compromise between no polarization and lots of sparkle and total polarization with lots of deep greens but less sparkle.
The above image shot was taken with a full frame, 36 MP DSLR with 24-70 F2.8 zoom lens with polarizer on a carbon fiber tripod.