This year was a exceptionally difficult year to pick a favorite, but there was one that stood out above the rest.
The photo I selected came from Yellowstone National Park along the Nez Perce Creek. Chad and I stopped along the road to watch a buffalo graze off in the distance. I walked a short distance with my long lens and realized that the buffalo isn't what I should be pointing my camera at. The Nez Perce Creek was my subject, with the geysers off in the distance and the beautiful sunrise beyond that.
Nikon D90, 12-24mm @f14, ISO 200, circular polarizer, Photo by Derek Griggs (click for full size)