Photo @materas // Cirrus clouds over Glacier Peak at sunset, Glacier Peak Wilderness, Washington. Cirrus clouds can be an indication of changing weather, and a method of predicting the forecast for wilderness travelers. Sometimes they are called mares tails for their resemblance to a horse's tail. Either way they are beautiful when lit up at sunset! Follow me @materas for more images like this from Washington and around the world. #volcano #glacier #glacierpeak #wilderness