Early this morning I rode my bike to this spot and took a few pictures. When I got home I made a quick black and white value sketch, stretched some watercolor paper and when it was dry masked out the areas I wanted to keep white. I then poured liquid watercolor over the paper. First yellow, then red and finally blue.
Here it is with the mask removed.
I then painted in the tree trunks and created more textures in the foreground and the bushes on the far side of the river. Unfortunately I didn't take any more process pictures, but here's the final result.