There are points dotted around with altitude over 900m, such as Mikuni-dake Mountain (959m) the highest point, then Karakasa Pass (935m), and Mt. Onomurawaridake (931.7m) located in its southern to eastern part, about two thirds of the entire area is at an altitude of between 600m to 800m.
三国岳(959m)を最高地点に、傘峠(935m)や小野村割岳(931.7m)など標高900m以上の地点が南部から東部にかけて点在し、標高600-800mの部分が全体の約2/3を占める。