The cabin is only a little farther.
farther  /ˈfɑɚðɚ/ adverb
: to or at a more distant place or time or a more advanced point :FURTHER.
drive farther north
It's farther away than I'd thought.
I tried to read the book, but I got no farther [=further] than the first chapter.
You think I don't like you? Nothing could be farther from the truth. [=it is completely untrue that I don't like you; I like you very much]