The early exploration of the Northwest Territory by Lewis and Clark did not reach as far north as the Lincoln County expanses. The first recorded entry by European explorers was of David Thompson, a scout for the North West Company, who traversed the area in 1811. He noted physical locations in present-day Lincoln County. He described Hell Gate Rapid (calling it 'Strong Rapid'). That stretch of the Columbia River is now tame, because of the presence of Grand Coulee Dam. After this, there was considerable exploration by fur trappers and others, including famed Scotch botanist David Douglas in 1826.