When you go left with the bonewagon you find a tree maze.

You seem to be coming out from a random gate. You would need some guidance.

You were going to Rubacava, right?

Take the signpost Glottis bumped with. It will guide you and point you to correct direction.

Pick up the signpost and walk into the tree maze.

Always go a small distance to the direction the signpost shows and try again. You have to be in the tree maze area.