High on the Knik Glacier, two vertical miles above Prince William Sound in the Gulf of Alaska, lies a sweeping icefield that has seldom felt the press of a human foot. After a long day of aerial photography in the valleys below, clear skies beckoned me to explore this mysterious territory I had only seen on maps. Mile after mile of untouched glacier spread out below as I ascended higher and higher up the glacier, racing against time to get to the pass before sunset. Alas, with the shortening days of late September, the sun dipped below the mountains of Prince William Sound before I got there. What initially felt like a disappointment turned out to be a blessing in disguise as gauzy pink and cobalt hues bathed a rarely-seen wonderland of mountains and glaciers.