Alpenglow is a natural phenomenon where mountains are bathed in soft red, pink, or orange light just before sunrise or around sunset, when the sun is below the horizon. This glow occurs as sunlight scatters through the atmosphere, leaving warmer wavelengths to illuminate elevated surfaces, especially snow-covered peaks. Unlike direct sunlight, alpenglow creates a gentle, shadowless light that gives mountains a glowing, almost internal warmth for a brief and visually striking moment.
In standard English, alpenglow is simply “a reddish glow seen near sunset or sunrise on the summits of mountains.” Merriam-Webster also traces the word to a partial translation of the German Alpenglühen and dates its first known English use to 1862. That broad definition is still how the word is commonly used in travel writing, park interpretation, and photography.
