Normally one would expect to see a gradual and even change in foliage vibrance from bottom to top. In this case there is a lower band of 'at peak' vibrant Autumn shades that abruptly change to 'past peak' rust color. And the evergreens at the water's edge seem to be more vibrant than those on the cliff face - hmmm. My high school Science Teacher Tom Ketchum explained this phenomenon long ago. The lake is very deep 386 feet (117.65 M) and surrounded by high mountains on the East and west sides and lower gaps at the North and South ends. By the end of summer, the lake is full of warm water. The N & S gaps allow colder air to flow over the water. The cold air is denser and does not allow the warm air to rise higher than the gaps. Because of this temperature variance the leaves of the trees hold their color longer than those higher up in the cold zone... Bob