{{Short description|Hill in Cornwall, England}} {{Use British English|date=February 2026}} {{Use dmy dates|date=April 2022}} {{coord|50.181|-5.227|display=title}}
thumb|The telecommunications mast on Carnmenellis Hill. The mound to the right is a covered reservoir according to the OS map
'''Carnmenellis Hill''' (or just '''Carnmenellis''') gives its name to the area of west Cornwall in England, between Redruth, Helston and Penryn. The hill itself is situated approximately three miles (5 km) south of Redruth.<ref name=OS>Ordnance Survey: Landranger map sheet 203 ''Land's End'' {{ISBN|978-0-319-23148-7}}</ref> It is one of five Marilyns in Cornwall; the others being Brown Willy (420 m), Kit Hill (334 m), Hensbarrow Beacon (312 m) and Watch Croft (252 m). The natural region of Carnmenellis has been designated as national character area 155 by Natural England.<ref>[http://www.naturalengland.org.uk/Images/155_Carnmenellis_tcm6-32160.pdf ''NCA 155: Carnmenellis - Key Facts & Data''] at www.naturalengland.org.uk. Accessed on 8 Sep 2013</ref>
'''Penmarth''', a nearby village, is sometimes referred to locally as Carnmenellis.<ref>{{cite web|url=http://www.genuki.org.uk/big/eng/Cornwall/Carnmenellis/|title=GENUKI website; Carnmenellis}}</ref>
The term 'Carnmenellis Granite' refers to the plateau of high ground in this area, one of five granite plutons in Cornwall that make up part of the Cornubian batholith (see also Geology of Cornwall).<ref>{{cite journal | last1=Ghosh |first1= P. K. |year=1934 | pages=240–276 | volume=90 |title=The Carnmenellis Granite: its petrology, metamorphism and tectonics |journal=Quarterly Journal of the Geological Society |issue= 1–4 | doi = 10.1144/GSL.JGS.1934.090.01-04.09 }}</ref><ref>{{cite journal | doi = 10.1093/petrology/27.3.571 | volume = 27 | issue = 3 | journal = Journal of Petrology |year=1986 | pages= 571–604 | title=The Genesis of the Cornubian Batholith (South-West England): the example of the Carnmenellis Pluton | last1= Charoy | first1=B. }}</ref>
Carnmenellis was also the name of a former ecclesiastical parish created in 1846 from part of Wendron parish. Initially, the parish included the area which later became the parish of Pencoys. Today, most of the Carmenellis area is in Stithians civil parish.
The summit of Carnmenellis Hill is located at OS grid reference:{{gbmapping|SW 695 364}}) and is 252 metres (828 feet) above sea level.<ref name=OS /> A microwave transmitting and receiving tower on the summit is used for telephone and computer connections as well as other data and television and radio broadcasting links. It is maintained by BT. A number of Iron Age fortifications surround the hill, but little archaeological research has been done on the site.
There is no public right of way across the summit, and the surrounding land is private farmland, though about half of the fields are Open Access land.
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Category:Villages in Cornwall Category:Moorlands of Cornwall Category:Geology of Cornwall Category:Hills of Cornwall Category:Marilyns of Cornwall Category:Natural regions of England