Ah, what amazing colors. I don't do a lot of nature shooting (lack of opportunity rather than lack of interest), but last year I got to spend a night at a gorgeous campground in the vicinity of Lake Tahoe, and shot some photos of the forested area right down by the river running through the location. The reflections in the water and those vivid greens and blues were so much fun to see in the images, and now looking at this shot of yours, I bet it would be incredible to get to shoot there in the fall, too. There were a lot of pine trees that would still be green, but some other leafy trees that I bet would have the seasonal colors to add in to the picture.