Tenkiller Ferry Lake, or more simply, "Lake Tenkiller," is a reservoir in eastern Oklahoma formed by the damming of the Illinois River. The lake covers 12,900 acres (52 km˛) and has a shoreline of over 130 miles in the Cookson Hills of the Ozark Mountains of Cherokee and Sequoyah counties, about seven miles (11 km) northeast of the town of Gore a few miles from highway 10.
