Anonymous lake near Marble, Colorado. Still reflection is photographers delight, fall foliage and eventful sky is a huge bonus.. But it is not easy to get perfect reflection shot. I tried it around noon on my 1st day, but it was too windy.. Decided to try at sunset but winds got stronger. Finally I got lucky on 2nd day and I mean really lucky, because reflection was gone within minutes after taking this photo

Gear
Nikon D810
Nikon 14-24 mm wide angle lens