(Salem, OR)  --  The search continues for a climber who went missing after falling several hundred feet on Mt. Jefferson.  Police say 33-year-old Steven Vanpelt was descending the mountain when he fell on Friday.  Search and rescue teams from several agencies are trying to find him.  Life Flight and the Oregon Army National Guard searched by air over the weekend.  Search crews are battling difficult terrain, including snow, cliffs, large boulders, crevices and falling rock.