Although Fort Union National Monument witnesses many types of varying weather patterns, freezing fog is not a regular occurence. These images were taken on January 6, 2015 as freezing fog encompassed the fort and surrounding valley.
On January 10, 2015, after sustaining extremely low temperatures, Fort Union and the surrounding vegetation in the valley was blanketed in a thick layer of hoar frost. Needle-like in appearance, these fragile ice formations lasted only about 90 minutes after the sun had fully risen. Enjoy these photos of Fort Union surrounded by a stunning frozen landscape.