As the sun set, the mountains of the Sierra Nevada would hold the light long after we were shrouded in darkness in whatever valley we had chosen to sleep in that night. John Muir called it the Range of Light for a reason. See the previous post to see how the peaks looked as the last direct light of the sun hit them. After the shadows finally crept all the way up the faces of these giants and the sun was officially gone, then they would slowly take on a strange red glow, which would grow more saturated for a few minutes, then quickly fade away and it would officially be dark. This picture is taken after the sunset, and exposed such that the shadowed foreground doesn't seem 'twilightish', but in reality it was quite dark at this point.
-llg