The trip up the mountain was perilous and I was accosted several times by rogue animals and at one point by two terrifying teleporting adept mages. They were desperate to kill a buck that was running down the mountain and, when I intervened on the buck's behalf, I became the mages' target. I murdered them and quickly made my way up the mountain to a keep that stood on a cliff's edge. There was nothing in the stronghold, save for a few items and books; the view from the top was staggering and let me take in the complete sights of the valley below, including Riverwood.