The last rays of the day emphasize the windblown patterns of the Great Sand Dunes, while the Mt. Herard massif looms in the distance. The Great Sand Dunes (the highest dunes in North America) are nestled up against the Sangre de Cristo Mountains in southern Colorado. The Sangre de Cristo (blood of christ) mountains are said to be named for the deep red alpenglow they show at sunrise and sunset. The Sangres also hold a handful of Colorado's 53 "fourteeners"