09/26/2026
PSA: Summer has left the chat and chlorophyll is OUT. Xanthophylls, carotenes, and anthocyanins are IN.
As daylight shrinks and temperatures sink, fall is officially fashioning up on the mountain—and it's giving looks courtesy of chemistry. Plants have been preparing for abscission (aka “cutting off”), restricting the movement of sugars between leaf and stem. As chlorophyll breaks down, other pigments finally get their moment in the spotlight: xanthophylls pop off in gold, carotenes serve orange, and anthocyanins bring the drama in red.
Heading to the trail? Time for a fit check. Check the forecast, bring layers, and pack the 10 Essentials. Remember: there’s no bad weather, just poor preparation.
Every fall serves something different, with weather, drought, and early frost shaping the season’s palette. What looks are you serving?
NPS Photo / Filo Merid