Iíve been up Sill many times, but I havenít been there in 10 years, so I canít report on current conditions. I think itís easier to get to Glacier notch from the Palisade Glacier, rather than from the south fork. I ran into a lot of willows and an unpleasant stream crossing when I approached from the south fork. My guidebooks rate the North Couloir as class 3, class 3-4, or class 4. If your routefinding is good, you wonít find any class 4. In fact, I once descended it and only needed my hands for one move. Of course, snow can make things more ďinteresting.Ē My guess is that youíll climb the rock with hands and bare boots, stepping on reasonably firm snow part of the time. Maybe somebody will chime in with more recent information. Iím thinking about going up again in August.