Chicken Run

Crawl to the back of the chimney and get yourself locked into the smallest part of the crack. From there thrutch an curse your way to the top using body locks and chicken wings. Loose ish rock near the top, but nothing to cry about.

Also a long sleeve shirt and pants would be recommended. This thing eats clothes.

Located in the chimney seen between Fraggle Rock and Mystery Arete. Hard to miss. (Don't mess with the oak growing at the front)

A pad if you can make it fit.