Cape Patience is a peninsula protruding 65 km (40 mi) km of east-central Sakhalin Island into the Sea of Okhotsk. It forms the eastern boundary of the Gulf of Patience. The width of the peninsula varies from less than 1 km (0.62 mi), at the Lodochniy Isthmus, to 30 km (19 mi) at its widest point. It reaches a maximum elevation of 350 m (1,150 ft). The cape is the southernmost extension of the East Sakhalin Mountains, a north-south range that runs along the eastern side of Sakhalin Island.