Lake Passaic was a prehistoric proglacial lake that existed in northern New Jersey in the United States at the end of the last ice age approximately 19,000–14,000 years ago. The lake was formed of waters released by the retreating Wisconsin Glacier, which had pushed large quantities of earth and rock ahead of its advance, blocking the previous natural drainage of the ancestral Passaic River through a gap in the central Watchung Mountains. The lake persisted for several thousand years as melting ice and eroding moraine dams slowly drained the former lake basin. The effect of the lake's creation permanently altered the course of the Passaic River, forcing it to take a circuitous route through the northern Watchung Mountains before spilling out into the lower piedmont.
A typical scene along the Passaic River which results from the drainage of the Great Swamp, a remnant of the Glacial Lake Passaic
New Jersey is a state situated within both the Mid-Atlantic and Northeastern regions of the United States. It is the most densely populated of all 50 U.S. states, and is situated at the center of the Northeast megalopolis. New Jersey is bordered on its north and east by New York state; on its east, southeast, and south by the Atlantic Ocean; on its west by the Delaware River and Pennsylvania; and on its southwest by Delaware Bay and Delaware. At 7,354 square miles (19,050 km2), New Jersey is the fifth-smallest state in land area, but with close to 9.3 million residents as of the 2020 United States census, its highest decennial count ever, it ranks 11th in population. The state capital is Trenton, and the state's most populous city is Newark. New Jersey is the only U.S. state in which every county is deemed urban by the U.S. Census Bureau with 13 counties included in the New York metropolitan area, seven counties in the Philadelphia metropolitan area, and Warren County part of the heavily industrialized Lehigh Valley metropolitan area.
Washington Crossing the Delaware, an 1851 portrait by Emanuel Leutze depicting Washington's covert crossing the Delaware River from Bucks County, Pennsylvania to Mercer County on December 25, 1776, prior to the Battle of Trenton
Washington Rallying the Americans at the Battle of Princeton, a portrait by William Ranney depicting George Washington rallying Continental Army troops at the Battle of Princeton in January 1777
Sunrise on the Jersey Shore at Spring Lake in Monmouth County (top) and sunset at Sunset Beach in Cape May County (bottom)
Atop the Hudson Palisades in Englewood Cliffs, Bergen County, overlooking the Hudson River, the George Washington Bridge, and the skyscrapers of Midtown Manhattan, New York City