Have you ever seen water this colour before?
I haven't, so I started to wonder why. A friend in a photo group I belong to said it's from "rock-flour". From further up where the snow starts melting, the rocks crash and crush together and make --- rock flour. The particles suspend themselves in the water and voila -- emerald green water as cold as molten ice.
I also learnt that there is another lake in British Columbia that has this colour. Called Kalamalka Lake in the Okanagan Valley portion of the province.
They grow wine in the Okanagan Valley. Maybe it's time for a road trip. To check out the water colour of course.