Boot pack. There isn't a zipper line (skin track) beyond the base of the Ravine. Most also hike, although some still skin, from HoJo's through Little Headwall. You can usually skin to a point on Hillman's but after a while the downhill traffic and the pitch mandate booting up the rest. There are other places on Mt. Washington where you can skin all the way. Less steep and far less busy terrain.
Some people hike the cog railway, literally. I've done it. We met a crew member coming down it doing an inspection by foot and he let us continue hiking up. It's an interesting walk. Lots of skiing on the west side of the mountain.