十和田湖
Lake Ogawara, a brackish lake at the base of the Shimokita Peninsula, is the eleventh largest lake in Japan, the largest brackish lake in the Tōhoku area, and the prefecture's largest lake. Lake Towada, a lake that sits in a volcanic caldera, straddles Aomori's boundary with Akita. The lake is a primary feature of Towada-Hachimantai National Park and is the largest caldera lake in Honshu. Also within the park, the Oirase River flows east towards the Pacific Ocean from Lake Towada. Another feature of the park, the Hakkōda Mountains, an expansive volcanic group, rise in the lands to the south of the city of Aomori and north of Lake Towada.