Some Trees Are Already Turning Yellow in Colorado’s Mountains. Here’s Why

Some trees are already turning yellow in Colorado’s mountains. Here’s why.

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 the High Country, West said a half-dozen reporters were blowing his phone up, all with the same question: “Is autumn starting early in Colorado?” West — who said that friends sometimes jokingly refer to him as “Dr. Aspen” — is the go-to guy at the Col…

Some trees are already turning yellow in Colorado’s mountains. Here’s why

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 the high country, West said a half-dozen reporters were blowing his phone up, all with the same question: “Is autumn starting early in Colorado?” West — who said that friends sometimes jokingly refer to him as “Dr. Aspen” — is the go-to guy at the Col…