{{Short description|Natural area in Pennsylvania}} {{Use American English|date=July 2025}} {{Use mdy dates|date=February 2025}} {{Infobox protected area | name = Halfway Run Natural Area | alt_name = | iucn_category = | image = Halfway Run Natural Area (8654385532).jpg | image_alt = | image_caption = | image_size = | map = USA Pennsylvania | map_alt = | map_caption = Location within Pennsylvania | map_width = | location = [[Union County, Pennsylvania|Union County]], [[Pennsylvania]] | nearest_town = [[Rebersburg, Pennsylvania|Rebersburg]] | coordinates = {{coord|40.9966|N|77.1781|W|region:US-PA|format=dms|display=inline,title}} | coords_ref = | area = {{convert|407|acre}} | established = | visitation_num = | visitation_year = | governing_body = | url = }} '''Halfway Run Natural Area''' is a {{convert|407|acre|ha|adj=on}} [[protected area]] in [[Centre County, Pennsylvania|Centre County]], [[Pennsylvania]], United States. It is part of [[Bald Eagle State Forest]],<ref name=":5">{{Cite web |title=Bald Eagle State Forest Wild and Natural Areas |url=https://www.dcnr.pa.gov/StateForests/FindAForest/BaldEagle/Pages/Wild_NaturalAreas.aspx |access-date=2023-12-16 |website=Pennsylvania Department of Conservation & Natural Resources |language=en-US}}</ref> and is a short distance from [[R. B. Winter State Park|R.B. Winter State Park]].<ref name="Fergus">{{Cite book |last=Fergus |first=Charles |title=Natural Pennsylvania: Exploring the State Forest Natural Areas |publisher=Stackpole Books |year=2002 |location=Mechanicsburg, PA |pages=94–97}}</ref>
== Description == The area protects a glaciated landscape of a type uncommon for Central Pennsylvania, along both banks of [[Halfway Run]], which has been designated as a stream of unimpaired quality.<ref>{{Citation |author=[[United States Environmental Protection Agency]] |title=Assessment Summary for Reporting Year 2006 Pennsylvania, Lower West Branch Susquehanna Watershed |url=http://oaspub.epa.gov/tmdl/attains_watershed.control?p_huc=02050206&p_state=PA&p_cycle=2006&p_report_type=A |archive-url=https://web.archive.org/web/20170821003437/https://oaspub.epa.gov/tmdl/attains_watershed.control?p_huc=02050206&p_state=PA&p_cycle=2006&p_report_type=A |archive-date=August 21, 2017 |url-status=dead |accessdate=August 1, 2015}}</ref> The area is known for numerous [[pingo]] scars from the age of glaciation, in the form of ponds filling pits that formed when small ice-covered hills collapsed.<ref name="Fergus" /> Wild [[trout]] naturally reproduce in Halfway Run,<ref>{{Citation |author=[[Pennsylvania Fish and Boat Commission]] |title=Pennsylvania Wild Trout Waters (Natural Reproduction) – May 2015 |date=May 2015 |page=92 |url=http://fishandboat.com/trout_repro.pdf |accessdate=August 1, 2015 |archive-date=July 1, 2015 |archive-url=https://web.archive.org/web/20150701171657/http://www.fishandboat.com/trout_repro.pdf |url-status=dead }}</ref> and in springtime various branches of the stream contribute to [[vernal pool]]s that are breeding spots for amphibians.<ref>{{Citation |author=Pennsylvania Science Office of [[The Nature Conservancy]] |title=A Natural Areas Inventory of Union County, Pennsylvania |page=32 |year=2000 |url=http://www.naturalheritage.state.pa.us/cnai_pdfs/union%20county%20nai%201993_2000.pdf |accessdate=August 2, 2015}}</ref>
==References== {{reflist}}
{{Protected Areas of Pennsylvania}}
[[Category:Protected areas of Union County, Pennsylvania]]