Ellis Island is located at the mouth of which river?
Harlem RiverHarlem River
1%Hudson RiverHudson River
72%Potomac RiverPotomac River
3%Named for the British explorer who mapped it in 1609, the Hudson River flows the entire length of the state of New York, originating in its mountainous upstate area near the border with Vermont. From there, it flows to the southern tip of Manhattan, where it merges with the Atlantic Ocean. Ellis Island, the Statue of Liberty, and Governor’s Island are all found in this area, also called the New York Bay.
Source: Britannica