Possibly what makes the light trek so rewarding are the views
of the stunning green lake that is fed by the glacier activity.
Within it are green-blue layers of ice sandwiched between layers
of dark sediment. The spectacle is reflected in the water
which is laced with rock flour. Rock flour is the fine
powery remains of massive boulders that have been ground to
a pulp by the glaciers. The sediment floats in the water
and reflects the colors of green and blue for which the Rocky
Mountains are famous.