Training day 2: The Black Ridge. On the Rifflehorn, we got passing grades on the vertigo test and our rock climbing skills. But Christoph wanted to work on our overall agility climbing and moving across exposed mixed rock at altitude. At 10, 700 feet the seldom traversed Black Ridge definitely fit the bill. We took the gondola to the summit of the Unterrothorn on the east side of Zermatt and walked behind the station to our starting point. That hike is depicted here. Is the everpresent mountain in the background familiar?