New France was the area colonized by France in North America during a period beginning with the exploration of the Saint Lawrence River by Jacques Cartier in 1534 and ending with the cession of New France to Spain and Great Britain in 1763. At its peak in 1712 (before the Treaty of Utrecht), the territory of New France, also sometimes known as the French North American Empire or Royal New France, extended from Newfoundland to the Rocky Mountains and from Hudson Bay to the Gulf of Mexico.