Alpenglow, Mount Conness. Yosemite National Park, California. June 18, 2011. © Copyright G Dan Mitchell – all rights reserved.

The last evening light illuminates domes near Tenaya Lake and the summit of Mount Conness with briilliantly colorful alpenglow, Yosemite National Park.

The tall peak at upper left is the summit of Mount Conness, one of the highest peaks in Yosemite National Park. The peak is located on the park boundary and the Sierra Nevada crest a bit north of Tioga Pass, and is visible from many places in the Tuolumne/Tioga high country. It is also a popular destination for peak baggers. The left foreground granite dome is the lower face of Polly Dome, which drops to the shoreline of Tenaya Lake. The left slope of Pywiak dome is visible in the shadows at lower right and beyond is the more brightly illuminated Medlicott dome.

I forgive you if you don’t believe the colors that you see in this photograph. I barely believe them myself, and I was (obviously!) there for the show. What happened on this evening was a near perfect example of a light phenomenon that Sierra photographers watch for and are occasionally lucky enough to experience. I have learned to see the signs that indicate that this light is possible, but also to understand that even when the conditions offer this potential that they rarely deliver.

On certain cloudy evenings in the Sierra it appears that there will be no sunset color – everything is hazy and drab and washed out. But if things play out just right, this very set of drab conditions (that induce some photographers to put away their gear too soon!) can produce some of the most striking and intense color possible if a few things fall into place just right. On this evening I had stopped for a moment at Olmsted Point, thinking to photograph ice-covered Tenaya Lake with a long lens and including the mass of Mount Conness in the distance. When I arrived there, things were about as unpromising as they could possibly be. A dull, greenish-blue haze hung in the air, overcast washed out the light, and Conness was obscured by clouds. I had actually put my gear back in the car when I looked back up and noticed that the summit of Conness had briefly poked through the clouds, accentuating its bulk and the sense that it towered over the foreground mountains. The light was still awful (I have the photos to prove it! ;-) but I thought I’d see if I could get something with the peak emerging from its shroud.

But still nothing much happened. I turned the camera to photograph some nearby trees and a blackbird that was looking for snacks. Then I noticed that there was some brighter light to the southwest and I began to consider the possibility that the cloud cover might end a bit to the west – and that is requirement #1 for the light conditions I’m describing. If the cloud deck ends to the west, as the sun reaches the horizon it may briefly break under the clouds and send brilliantly colorful light up into the clouds in the Sierra from below, creating a miles-wide light panel of the most astonishing colors. But still, it was hazy and the peaks were shrouded in clouds. But then I noticed that the clouds around Conness were beginning to drift off to the east and thin a bit. I mentioned (knock on wood!) to one of the other photographers that there was a possibility of “miracle light,” but that I wasn’t making any promises!

Then the thinning clouds began to pick up a slight pink tinge and the left side of Conness began to get some light directly from the west. Then, within a minute or so, the colors went absolutely crazy. People around me were audibly gasping as the color changed. At one point several of us spontaneously looked up to the west when we noticed the light suddenly increase out of the corners of our eyes. At the same time, the clouds almost completely dissipated from the area around the peak and because the whole sky was filled with brilliantly colorful clouds, this light began to suffuse even the depths of the canyon and slopes facing away from the sunset with this amazing light.

Never put your camera away until the last light is gone. :-)

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