Peyto Lake as seen from Bow Summit. The lake is usually a much more vivid color, but all the rain this year has washed a lot more “glacial flour” into the water. That’s what they call the fine silt you get from all the rocks the glacier has crushed along the way.  It really is as fine as flour.  In small amounts, the glacial flour gives the lake a beautiful blue green color. In larger amounts, it turns the water more of a milky grey green.