Editing Allentown, Pennsylvania (section)

===Topography===
{{Further|Blue Mountain (Pennsylvania)|South Mountain (Eastern Pennsylvania)}}
Allentown's geographic boundaries include a total area of {{convert|18.0|sqmi|1}}. Of this, {{convert|17.8|sqmi|1}} is land and {{convert|0.2|sqmi|1}} is water, according to the [[United States Census Bureau|U.S. Census Bureau]]. Bodies of water include [[Jordan Creek (Pennsylvania)|Jordan Creek]] and its tributary, [[Little Lehigh Creek]], which join in the city and empty into [[Lehigh River]]. Other bodies of water in Allentown include [[Lake Muhlenberg]] in Cedar Creek Parkway and a pond in [[Trexler Park]].

====Adjacent counties====
Allentown is located in the [[Lehigh Valley]], an eastern [[Pennsylvania]] geographic valley located between two [[Appalachian Mountains|Appalachian]] mountain ridges, [[Blue Mountain (Pennsylvania)|Blue Mountain]], which varies from {{convert|1000|ft|m}} to {{convert|1600|ft|m}} in height about {{convert|17|mi|km}} north of the city, and [[South Mountain (Eastern Pennsylvania)|South Mountain]], a ridge of {{convert|500|ft|m}} to {{convert|1000|ft|m}} in height bordering the city's southern edge. The Lehigh Valley includes both [[Lehigh County, Pennsylvania|Lehigh]] and [[Northampton County, Pennsylvania|Northampton]] counties.

The Lehigh Valley's adjacent counties are [[Carbon County, Pennsylvania|Carbon]] and [[Monroe County, Pennsylvania|Monroe]] counties to its north, [[Bucks County, Pennsylvania|Bucks County]] to its southeast, [[Montgomery County, Pennsylvania|Montgomery County]] to its south, [[Berks County, Pennsylvania|Berks]] and [[Schuylkill County, Pennsylvania|Schuylkill]] counties to its west, and [[Warren County, New Jersey]] to its east.