Jackson, WY — Fall has arrived in Jackson Hole, and the valley is putting on a spectacular show of color. Warm daytime sunshine combined with chilly evenings triggers the chemical changes that turn leaves from green to vivid shades of yellow, orange and red. The National Weather Service and the National Park Service explain that as chlorophyll fades, other pigments such as carotenoids and anthocyanins become visible, creating the autumn palette.
Key Trees and Where to Find Them
Quaking Aspen: The most common fall transformer, aspens turn bright yellow, with occasional orange or red leaves. Healthy stands hold their color longer. Look for them at Willow Flats Overlook, Snake River Overlook, Oxbow Bend and Two Ocean Lake.
Narrowleaf Cottonwood: These trees shift to a striking yellow. As the leaves fall, the trees undergo a “hardening” process that removes water from cells, reducing freeze damage. Spot cottonwoods along the Gros Ventre River, Cottonwood Creek and Schwabacher’s Landing.
Black Hawthorn: This shrub or small tree produces fan‑shaped leaves that turn red in autumn. It thrives in moist stream corridors and open sunny spots. Good viewing spots include Moose‑Wilson Road and the Laurance S. Rockefeller Preserve.
Willow: Willows form dense thickets that provide food for elk and moose. Their long leaves turn yellow and orange, creating a bright carpet across low‑lying wetlands. Visit Blacktail Ponds Overlook, Willow Flats Overlook and Christian Ponds for the best vistas.
Why the Colors Appear Now
During the day, leaves produce sugars from sunlight. Overnight cold snaps cause the leaf veins to close, trapping those sugars. The trapped sugars, along with cooler temperatures and moisture levels, intensify the red pigments (anthocyanins) and preserve the yellow‑orange carotenoids. The result is a vivid, multi‑hued landscape that can last for several weeks, especially in healthy tree stands.
Tips for Visitors
- Dress in layers – mornings are crisp, afternoons can be sunny.
- Bring a camera; the light at sunrise and sunset makes the colors pop.
- Stay on designated trails to protect fragile ecosystems.
- Check the National Park Service website for any trail closures before heading out.
Whether you’re a local resident or a visitor, the fall foliage season offers a perfect opportunity to enjoy God’s creation, experience the beauty of the valley, and spend time with family outdoors.
Original reporting: Buckrail (Jackson WY) — read the source article.
