natgeotravel Video by @tobyharriman// Portage Lake, an hour drive from Anchorage, is a glacial body of water in the Chugach National Forest of Alaska. It sits in a long, heavily glaciated valley, which is fairly common up here. I have come up this way a few times, but the weather never panned out the previous times through. This night was an special exception and a timelapse goldmine!