Mid-November Colorado skies can be nearly cloudless but for vermilion sunrise clouds.

Evidence

Think of November half through and scarcely even a cloud in the sky, except the vermilion cloudlets which accompany the sun at his rising and setting! — Isabella L. Bird, A Lady’s Life in the Rocky Mountains, 206

Categorization

• CANDY: A gorgeous single image — vermilion cloudlets at sunrise and sunset in a cloudless November.