Emerald Lake is the largest lake in Yoho. It is fed by glaciers and dammed by a glacial moraine. It is surrounded by President Range, as well as Mount Burgess and Wapta Mountain.The hiking trail circuits the lake is about 5.2 km (3.2 mi).
A Canadian guide, Tom Wilson, discovered the lake accidentally in 1882. He gave the lake its name because of its remarkable colour, caused by fine particles of glacial sediment, also referred to as rock flour, suspended in the water.
It was the blue sky when I started painting. However, it became cloudy and cold when I have almost done. The lakes in the Rockies seem to have the similar colours.