The yellow tones in the sky were already painted in and a lot of shapes against the sky and the rock shapes were blobs of colour.

Using the colour of the rock shadows I painted in a few lines to create the illusion of water and the remaining colour looks like reflections.
There were a few pencil lines that I couldn't remove so I lifted the colour from the dark shape below them and created three birches.
Next I added some green foliage behind some of the larger rocks and with a darker green mixture made a pine tree.
I was mixing a dark to finish the birches when I dropped my brush onto the painting. That told me it was time to quit.
When I next post this painting at a later date I think I will turn the mess in the corner into autumn leaves and add some reds, oranges and yellow into the background trees.