Daylight within the high walled narrow canyons of the southwest are short maybe half that on the open prairies and the surrounding mountain tops. Before and after the equinoxes and on the winter solstice even shorter. Blue hour consisted of the majority of daylight hours.
"Autumn is a second spring when every leaf is a flower." - Albert Camus
Nice muted colors
Harry, thanks for your comment, although I prefer digitally optimized, as per “straight photography” aka as the image was made in deep open shade at the base of thousand + foot (centimeter) cliff or blue hour for this location at this time of day. ;) Cheers!