These pictures were captured on Silver Star Mountain in Gifford Pinchot National Forest outside Yacolt, Washington, November 17, 2005. They were taken by a backpacker from Vancouver who says he doesn't know what the figure was, but that he does not believe that it was another hiker or backpacker.
By taking a closer look at the photographs you can see pretty clearly that it is indeed a bipedal hominoid creature, but it could as well just been a human. Many other sightings of similar creatures have been made in the area, but the existence of the creature remains a mystery.