Shiretoko National Park (知床国立公園, Shiretoko Kokuritsu Kōen) covers most of the Shiretoko Peninsula at the northeastern tip of the island of Hokkaidō, Japan. The word "Shiretoko" is derived from an Ainu word "sir etok", meaning "the place where the earth protrudes". The forests of the park are temperate and subalpine mixed forests; the main tree species include Sakhalin fir (Abies sachalinensis), Erman's birch (Betula ermanii) and Mongolian oak (Quercus mongolica). Beyond the forest limit there are impenetrable Siberian dwarf pine (Pinus pumila) thickets.