Yup, I have aborted a hike because of an inch of snow. I didn't recall exactly where the trail was, only that it was basically cut into a slope. Looking down at it I couldn't figure out where it would be safe to walk and where I would be risking sliding down the hill. It really changes things.

Obviously, I could have scraped aside the snow every couple of feet and figured it out but I knew there was a lot more such terrain ahead, it would have been very slow.