Here’s what to know about why leaves change color in the fall—and how the process is being impacted by climate change.

Colorado State Forest Service entomologist Dan West says the first reports of yellowing aspen leaves started in mid-August. By late last week, as sightings of possible fall foliage continued across ...

COLORADO, (KOAA) — Living in Colorado for the past six years, fall has become my favorite season. From crisp nights to snow-dusted mountains and pumpkin-spiced everything, it's the perfect season.

GEORGETOWN, Colo. — It’s really starting to look like fall in the Rocky Mountains with fresh snow on some of the peaks and with the aspen leaves starting to change. Those leaves may be reaching peak ...

Colorado’s fall colors in the state’s mountains are emerging a couple of weeks early in 2025 as yellows and oranges are beginning to appear ahead of the annual September change over. At locations like ...

Aspen leaves along the Peak to Peak Highway are approaching their peak. ABOVE: Near the highway, golden aspens reach for the sky on Friday. BELOW: A pair of aspen trees stand in contrast to dark ...

From the cliffside aspens of the Pecos Wilderness to the vibrant maples of the Manzano Mountains, the symphony of fall colors is about to commence in New Mexico But what’s conducting this complex ...