The SP page won't help you. I was scoping it out last December. I've got a picture looking north from the summit towards Boundary Peak. I can email it to you if you send me an email I can reply to. It's mostly walking, but I would expect some scattered third class stretches (not just one spot. The ridge down towards Boundary gets hairy in places. You can probably keep the exposure down by dropping below the crest, but that can bring its own difficulties. People ski that route in winter, but I doubt they stay on the crest the whole way.