I really like the sepia, and I also like the vanishing point and how the trees grow misty toward the back. I'm not sure, however, how well this fits the challenge, seems a bit "shoehorned" in, perhaps. Still, a strong photo. 6.
You effectively portrayed the sentiment here, I think, with the color choice. I like the vertical orientation. My only suggestion might have been to make it more square to show more "empty space" water.