What is the meaning of "just past" in this sentence:
We’re a small community in the forest; people say that no roads lead here, just past.
‘just’ here means ‘only’. Roads go past the village, but not to it. It's a colorful way of saying that, of the people who use the road, practically none stop at the village.
(Added) The meaning of past is ambiguous. Most commenters take it to mean that the road bypasses the village. I choose instead to read past as ‘beyond’: the road may happen to go through the village, but it was not made for the village; no one using the road is going to the village, they're all going beyond it. (Added also) My reading is supported by the phrase “people say”, which does not normally introduce a statement of literal and readily-confirmed fact.