The Lehigh River (/ˈliːhaɪ/) is a 109-mile-long (175 km) tributary of the Delaware River in eastern Pennsylvania. The river flows in a generally southward pattern from the Pocono Mountains in Northeastern Pennsylvania through Allentown and much of the Lehigh Valley before joining the Delaware River in Easton.
Part of the Lehigh River and a number of its tributaries are designated Pennsylvania Scenic Rivers by the state's Department of Conservation and Natural Resources.
Bethlehem is a city in the Northampton and Lehigh counties in the Lehigh Valley region of eastern Pennsylvania, United States. As of the 2020 census, Bethlehem had a total population of 75,781, making it the second-largest city in the Lehigh Valley after Allentown and the seventh-largest city in the state. Among its total population as of 2020, 55,639 were in Northampton County and 19,343 were in Lehigh County. The city is located along the Lehigh River, a 109-mile-long (175 km) tributary of the Delaware River.
Bethlehem lies in the geographic center of the Lehigh Valley, a metropolitan region of 731 sq mi (1,890 km) with a population of 861,899 people as of the 2020 census that is Pennsylvania's third-most populous metropolitan area and the 68th-most populated metropolitan area in the U.S. Bethlehem borders Allentown to its west and is 48 miles (77 km) north of Philadelphia and 72 miles (116 km) west of New York City.
40°42′N 75°30′W / 40.700°N 75.500°W
The Lehigh Valley (/ˈliːhaɪ/) is a geographic and metropolitan region formed by the Lehigh River in Lehigh and Northampton counties in eastern Pennsylvania. It is a component valley of the Great Appalachian Valley bounded to its north by Blue Mountain, to its south by South Mountain, to its west by Lebanon Valley, and to its east by the Delaware River and Warren County, New Jersey. The Lehigh Valley is about 40 miles (64 km) long and 20 miles (32 km) wide. The Lehigh Valley's largest city is Allentown, the third-largest city in Pennsylvania and the county seat of Lehigh County, with a population of 125,845 residents as of the 2020 census.
Allentown (Pennsylvania Dutch: Allenschteddel, Allenschtadt, or Ellsdaun) is a city in the U.S. state of Pennsylvania. It is the county seat of Lehigh County, and is the third-most populous city in Pennsylvania, with a population of 125,845 as of the 2020 census. It is also the most populous city in the Lehigh Valley metropolitan area of eastern Pennsylvania, which had a population of 861,899 and was the 68th-most populous metropolitan area in the nation as of 2020.
Founded in 1762, Allentown is located on the Lehigh River, a 109-mile-long (175 km) tributary of the Delaware River. It is the largest of three adjacent cities, including Bethlehem and Easton in Lehigh and Northampton counties, in the Lehigh Valley region. Allentown is located 48 miles (77 km) north of Philadelphia and 78 miles (126 km) west of New York City.
Blue Mountain, Blue Mountain Ridge, or the Blue Mountains of Pennsylvania, is a ridge of the Appalachian Mountains in eastern Pennsylvania. Forming the southern and eastern edge of the Ridge-and-Valley Appalachians physiographic province in Pennsylvania, Blue Mountain extends 150 miles (240 km) from the Delaware Water Gap on the state's border with New Jersey in eastern Pennsylvania to Big Gap in Franklin County in south-central Pennsylvania at its southwestern end.
Views of Blue Mountain dominate the southern tier of most eastern and central Pennsylvania counties, providing an ever-visible backdrop cutting across the northern or western horizon. Most transport corridors and road beds piercing the barrier necessarily pass through large water gaps, including (west to east) the Susquehanna, Schuylkill, Lehigh and Delaware River valleys or wind gaps, low gaps in the ridge caused by ancient watercourses. The barrier ridge forms a distinct boundary between a number of Pennsylvania's geographical and cultural regions.