Walton and Ivythorn Hills

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This article is about the hills in Somerset, England. For the hill in Worcestershire, England, see Walton Hill.
Walton and Ivythorn Hills
Site of Special Scientific Interest
Viewpoint on Walton Hill
Walton and Ivythorn Hills is located in Somerset
Walton and Ivythorn Hills
Shown within Somerset
Area of Search Somerset
Grid reference ST475346
Coordinates 51°06′30″N 2°45′05″W / 51.10828°N 2.75129°W / 51.10828; -2.75129Coordinates: 51°06′30″N 2°45′05″W / 51.10828°N 2.75129°W / 51.10828; -2.75129
Interest Biological
Area 34.9 hectares (0.349 km2; 0.135 sq mi)
Notification 1953
Natural England website

Walton and Ivythorn Hills is a 34.9 hectares (86 acres) biological Site of Special Scientific Interest near Street at the south-eastern end of the Polden Hills in the English County of Somerset, notified in 1953. Walton Hill is south of the village of Walton, and Ivythorn Hill (sometimes spelled Ivy Thorn Hill) is south of Street.


The Polden Hills a long, low ridge, extending for 10 miles (16 km), and separated from the Mendip Hills, to which they are nearly parallel, by a marshy tract, known as the Somerset Levels. The ridge is underlain by Blue Lias with alternating strata of limestone and rheatic clay and Keuper marl.[1]

At the highest point on Walton Hill, which reaches 80 metres (260 ft) above Ordnance datum (mean sea level),[1] there is a topograph or orientation stone used as a triangulation point and highlighting key features of the surrounding landscape including the Somerset Levels and the Admiral Hood Monument.[2][3] It forms the starting point for the 6 miles (9.7 km) long footpath known as the Polden Way.[4]


Walton windmill

There is some evidence of the remains of ancient earthworks on Walton Hill.[citation needed]

A quarry on Ivythorn Hill produced stone for Street Manor in 1403.[5]

Walton windmill on Walton Hill was described as "new-erected" in 1741, although there had been a mill erected on the site in 1342.[5] It was worked until 1906.[6] It is now a Grade II listed building and private residence.[7][8]

The shoe manufacturer C. & J. Clark, through the Society of Friends, had a small sanatorium and convalescent home on Ivythorn Hill overlooking Street. In 1931, this chalet style building was leased to the Youth Hostel Association and became the first youth hostel in Somerset. It is still used for this purpose.[9]

This site is owned and managed by the National Trust. They acquired the freehold of 0.248 hectares (0.61 acres) of Ivythorn Hill in 1988 from Street Estates, which followed 16.606 hectares (41.03 acres) of Walton Hill in 1940 from Polden Farms Ltd and the initial 18.751 hectares (46.33 acres) of Ivythorn Hill and Wood in 1919 from Baron St Audries.[10]


Walton and Ivythorn Hills are covered by a variety of semi-natural habitats. These include unimproved calcareous grassland, scrubland and coppiced woodland including field maple and Ash. The range of habitats are home to many species of invertebrate. Butterflies, Leafhoppers, Spiders and Soldier Flies are particularly well represented. There is also a population of Great Green Bush Cricket (Tettigonia viridissima).[1]

Between 2011 and 2013 a project was undertaken to increase the population of Large blue butterflies on the Polden Hills. This included planting Wild Thyme and managing the grazing on Walton Hill.[11]


  1. ^ a b c "Walton and Ivythorn Hills SSSI citation sheet" (PDF). English Nature. Retrieved 24 May 2015. 
  2. ^ "TP9460 - Walton Hill". Trig Pointing UK. Retrieved 24 May 2015. 
  3. ^ "Assessment of Special Landscape Features". Mendip District Council. Retrieved 25 May 2015. 
  4. ^ "The heart of the West: a land of heroes and windmills". Western Daily Press. 3 February 2011. Retrieved 25 May 2015. 
  5. ^ a b Siraut, M.C; Thacker, A.T.; Wliiamson, Elizabeth. "Parishes: Walton. A History of the County of Somerset: Volume 9, Glastonbury and Street". British History Online. Victoria County History. Retrieved 24 May 2015. 
  6. ^ Coulthard, Alfred J, and Watts, Martin (1978). Windmills of Somerset and the men who worked them. London: The Research Publishing Co. pp. p62. ISBN 0-7050-0060-5. 
  7. ^ "Walton Windmill". Images of England. English Heritage. Retrieved 8 February 2009. 
  8. ^ "Walton Windmill". National Heritage List for England. Historic England. Retrieved 24 May 2015. 
  9. ^ "Youth Hostel, Street". Youth Hostel Association. Retrieved 24 May 2015. 
  10. ^ "Acquisitions Up to December 2011" (PDF). National Trust. Retrieved 24 May 2015. 
  11. ^ "Expanding the Large Blue Landscape in the Polden Hills. Project Update" (PDF). Butterfly Conservation. Retrieved 24 May 2015.