From Lake Erie the border is lead into the Niagara River, which takes it into Lake Ontario. From here, the boundary heads northwestward until it reaches 43°27′N 79°12′W﻿ / ﻿43.450°N 79.200°W﻿ / 43.450; -79.200, where it makes a sharp turn towards the northeast. The border then reaches the St. Lawrence River, proceeding through it until finally, at 45°00′N 74°40′W﻿ / ﻿45.000°N 74.667°W﻿ / 45.000; -74.667, the border splits from the River and continues into Québec.[60]