In late September, autumn and winter collide in the Grand Tetons and can produce spectacular scenes of brilliant fall color, fresh snow, and storm clouds. This shot was from the last day of my week-long trip though Yellowstone and the Tetons and right after some snowfall at the higher elevations. It was cloudy all morning and then some diffused light started to shine through the clouds and light up this aspen grove, as the mountains slowly emerged from thick cloud cover at the same time.