At first look, you might think that the gold horizon is a reflection of the sun off the surface of the earth. When actually, this gold horizon is the Pacific ocean reflecting the sun as it sets in the West. There are several horizontal lines in this view I took from atop of a mountain.
Two are the ridgelines of mountain crests before me. The second is the storm clouds above. The next is the Pacific coastline. Then the horizon beyond the ocean. Thereafter the higher clouds in the distance.