Almost the entire region is mountainous except the main basins, Shuzan--the former site of Keihoku town office-and Uzu, and the Katsura-gawa River runs as if it connects these basins.
旧京北町の町役場が置かれた周山と宇津が主な盆地だが、その他は山地で、この盆地をつなぐように桂川が流れる。