Sauk Mountain rises more than 5,000 feet about the lower reaches of Skagit Valley. It’s nearness to the North Cascades Highway makes it a popular day hike. All of the times I’ve been there before its been partly couldy at best but I saw enough to know that it would afford great views at sunset. So, on Thursday I made my way up and captured these images of the sweet light over the Skagit River and valley…