:Hog Run

Hog Run begins in a valley in Davidson Township. It flows south for several tenths of a mile and its valley deepens. The stream then turns south-southwest for nearly a mile and the valley continues to deepen. It then turns south and then southwest. After a short distance, it reaches its confluence with Elk Run.

Hog Run joins Elk Run {{convert|1.46|mi|km}} upstream of its mouth.{{Citation|url = http://www.lycoming.edu/cwi/pdfs/paGazetterOfStreams.pdf|title = Pennsylvania Gazetteer of Streams|page = 74|date = November 2, 2001|accessdate = January 10, 2015|archive-date = September 17, 2015|archive-url = https://web.archive.org/web/20150917160158/http://www.lycoming.edu/cwi/pdfs/paGazetterOfStreams.pdf|url-status = dead}}

A total of {{convert|2.02|mi|km}} of Hog Run is considered to be impaired. This is approximately 4.97 percent of all the impaired streams in the watersheds of East Branch Fishing Creek and West Branch Fishing Creek. The cause of the impairment is atmospheric deposition and metals.{{Citation|author = Rod Morehart|url = http://www.sullcon.com/programs/2006SCCDTributaryStrategy.pdf|title = Sullivan County's Implementation Plan For the Chesapeake Bay Tributary Strategy|page = 5|year = 2006|accessdate = January 10, 2015|archive-url = https://web.archive.org/web/20160304235145/http://www.sullcon.com/programs/2006SCCDTributaryStrategy.pdf|archive-date = March 4, 2016|url-status = dead}}

Hog Run does not attain the stream standards of the Pennsylvania Department of Environmental Protection.{{Citation|url=http://sullivancounty-pa.org/app/download/6774752704/FishingInSullivanCounty20120626.pdf |title=Attaining/Non-Attaining Streams |date=June 26, 2012 |accessdate=January 10, 2015 |url-status=dead |archiveurl=https://web.archive.org/web/20150119120439/http://sullivancounty-pa.org/app/download/6774752704/FishingInSullivanCounty20120626.pdf |archivedate=January 19, 2015 }}

The elevation near the mouth of Elk Run is {{convert|1384|ft|m}} above sea level.{{Citation|author = Geographic Names Information System|url = http://gnis.usgs.gov/apex/f?p=136:3:0::NO:3:P3_FID,P3_TITLE:1177171,Hog%20Run|title = Feature Detail Report for: Hog Run|accessdate = January 10, 2015}} The elevation of the stream's source is between {{convert|2340|and|2360|ft|m}} above sea level.

Hog Run is on bedrock consisting of sandstone and shale for nearly all of its length. However, Wisconsinan Ice-Contact Stratified Drift occurs near the stream's mouth. Wisconsinan Ice-Contact Stratified Drift contains stratified sand and gravel, as well as some boulders. A glacial or resedimented till known as the Wisconsinan Till occurs near the headwaters of the stream.{{Citation|author=Duane D. Braun |url=http://www.dcnr.state.pa.us/topogeo/openfile/elkgrove.pdf |title=SURFICIAL GEOLOGY OF THE ELK GROVE 7.5-MINUTE QUADRANGLE SULLIVAN, COLUMBIA, AND LYCOMING COUNTIES, PENNSYLVANIA |page=20 |year=2007 |accessdate=January 10, 2015 |url-status=dead |archiveurl=https://web.archive.org/web/20070712171601/http://www.dcnr.state.pa.us/topogeo/openfile/elkgrove.pdf |archivedate=July 12, 2007 }}

The watershed of Hog Run has an area of {{convert|1.05|sqmi|km2}}. The stream is entirely within the United States Geological Survey quadrangle of Elk Grove.

The streambed of Hog Run is publicly owned. It is one of twenty streams in the Upper Susquehanna-Lackawanna drainage basin whose streambed is public property.{{Citation|author = Pennsylvania Department of Conservation and Natural Resources|url = http://www.dcnr.state.pa.us/cs/groups/public/documents/document/dcnr_009715.pdf|archive-url = https://wayback.archive-it.org/all/20130906135940/http://www.dcnr.state.pa.us/cs/groups/public/documents/document/dcnr_009715.pdf|url-status = dead|archive-date = September 6, 2013|title = Publicly-Owned Streambeds (See Note on Page 6) by Hydrologic Unit Code 8 (HUC8) Watershed|pages = 5, 6|accessdate = January 10, 2015}} The streambeds of the two other named tributaries of Elk Run (Long Run and Gallows Run) are also publicly owned, as is the streambed of Elk Run itself.{{Citation|author = United States Geological Survey|url = http://www.usgwarchives.net/maps/pa/county/sulliv/usgs/davidson.jpg|title = davidson.jpg|year = 1991|accessdate = January 10, 2015}}

Elk Run was entered into the Geographic Names Information System on August 2, 1979. Its identifier in the Geographic Names Information System is 1177171.

• Long Run (Elk Run), next tributary of Elk Run going downstream
• Gallows Run, next tributary of Elk Run going upstream
• List of tributaries of Fishing Creek (North Branch Susquehanna River)

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Category:Rivers of Sullivan County, Pennsylvania

Category:Tributaries of Fishing Creek (North Branch Susquehanna River)

Category:Rivers of Pennsylvania