Nikon D2x ISO 100 f4.5 @ 1/640 18-70f3.5-4.5 @ 44mm Duotoned in Photoshop

This image occurred quite by accident as my original intent was to walk out to a grove of aspen trees and photograph the fall color.

After walking with my back to this image for about a 1/4 mile I finally glanced over my shoulder and saw this scene. The smoke was from a prescribed burn a few miles away.