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. 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.
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).
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:grid reference ) and is 252 metres (828 feet) above sea level. 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.
- Ordnance Survey: Landranger map sheet 203 Land's End ISBN 978-0-319-23148-7
- NCA 155: Carnmenellis - Key Facts & Data at www.naturalengland.org.uk. Accessed on 8 Sep 2013
- "GENUKI website; Carnmenellis".
- Ghosh, P. K. (1934). "The Carnmenellis Granite: its petrology, metamorphism and tectonics". Quarterly Journal of the Geological Society. 90: 240. doi:10.1144/GSL.JGS.1934.090.01-04.09.
- Charoy, B. (1986). "The Genesis of the Cornubian Batholith (South-West England): the example of the Carnmenellis Pluton". Journal of Petrology. 27 (3): 571–604. doi:10.1093/petrology/27.3.571.