In wilderness conditions especially, wandering in the fog presents unexpected dangers. Up in the cascades it happened more than once where I got fogbound (cloudbound)working on radio repeater sites. Coming down the hill, you had about 10 feet of visibility. Once coming down Tiger Mountain (between Auburn and North Bend) I was creeping down the road in the fog doing about 2 mph and out of nowhere appeared a big black bear in the middle of the road. I would not want such an abrupt encounter while afoot. Another time on Grass mountain northeast of Enumclaw I was on a forest road in the fog and nearly got run over by a logging truck doing way too fast for the conditions. He banked his rig into the uphill side of the road, and I just about went over the edge trying to avoid him. Had I been walking the road instead, I probably would've gotten squished. He said he saw my headlight beams just before my rig came into view or he'd have hit me for sure.