I hope you'll keep returning to this subject. You've gotten some great shots of the tree. Long may it live.
Along the foothills of the Rocky Mountains, there is a small clump of trees that stands alone in the Cathy Fromme National Prairie Area. This is the peak of the fall colors for these trees and the sunrise was beautiful this morning. This is an HDR image to be able to see the colors of the sunrise along with the colors of the leaves.
A Colorado Lone Tree stands on the front range plains near Fort Collins at sunset. The sunsets in colorado in winter are a beautiful blend of orange and blue. This was one of the prettier versions.
Horsetooth Ridge - A sunrise looking thru the trees at Horsetooth Ridge.