At 45°00′N 71°30′W﻿ / ﻿45.000°N 71.500°W﻿ / 45.000; -71.500, the border begins to follow various natural features of the Appalachian Mountains, continuing to do so until 46°25′N 70°03′W﻿ / ﻿46.417°N 70.050°W﻿ / 46.417; -70.050, where it begins to head northbound, then northeastward at 46°41′N 69°59′W﻿ / ﻿46.683°N 69.983°W﻿ / 46.683; -69.983. Finally, at 47°27′N 69°13′W﻿ / ﻿47.450°N 69.217°W﻿ / 47.450; -69.217, the border heads toward Beau Lake, going through it and continuing into New Brunswick.