This is one of my top three favourites. The reflections you captured are awesome. Looking at this image I can almost imagine standing right there in the photo myself. Only very good photos can do that, and you have achieved it here, congratulations!
This looks so much like something in my state of AR (Buffalo National River). Will be interested in seeing the info on this shot. Good use of the challenge with an great photo. I might have cropped out the rocks at the bottom left, as I think they distract more than add to the depth of the photo. Like the rest of the composition very well and the nice depth of field used exposing those pebbles in the foreground as well as the rock formation being fairly clear.
Compositionally this is perfect. Love the leading shoreline to the reflections and colorful rock. It just feels soft and I feel a little more sharp and focused it would be perfect.