Breidden Hill is an extinct volcanic hill in Powys, Wales, near the town of Welshpool. It is immediately surrounded by the villages of Trewern, Criggion, Crew Green and Llandrinio. The peak of the hill reaches to 367 metres (1,204 ft). Footpaths which lead up to the summit provide excellent 360 degree views over Powys and over the border with England to the Shropshire Plain.
Breidden Hill is one of five peaks with neighbouring Moel y Golfa, which is the highest at 403 metres (1,322 ft), which is a "Marilyn", with a prominence of 261 metres (856 ft). The three others are Cefn y Castell (also known as Middletown Hill), Kempsters Hill and Bausley Hill (all over 800 feet (240 m) high) with its Iron Age galleried fortification. The five hills are sometimes collectively known as the Breidden Hills, and form a northern extension of the Long Mountain.
There are remains of a British Iron Age hillfort en route which may have been the site of the last stand of Caractacus. Rodney's Pillar at the top was built by the gentlemen of Montgomeryshire who supplied oak wood from the area and shipped it down the River Severn (which runs nearby at Bausley with Criggion) to Bristol where Admiral Rodney's naval fleet was built. Rodney's Pillar is increasingly being used as a navigational aid by helicopter pilots in this area, due to its visibility from large areas of Wales.
Beginning around 1789, for many years members of the Breidden Society, founded by John Dovaston (1740–1808), met near Rodney's Pillar for an annual festival of food, drink, poetry, and song; records of their meetings for 1809–15 are preserved at the Houghton Library of Harvard University (MS Eng 1168).
On 27 June 2018, a wildfire broke out on Breidden Hill, destroying an area of grassland close to Rodney's Pillar.
- "Handbook for travellers in North Wales". google.com. Retrieved 16 February 2015.
- "Kempster's Hill". www.hill-bagging.co.uk. Retrieved 23 June 2019.
- "Middletown Hill". www.hill-bagging.co.uk. Retrieved 23 June 2019.
- "Antiquities, biography, poetry, etc. : manuscript, 1801–1940". harvard.edu. Retrieved 16 February 2015.
- Rawson, P. F. and Brenchley, P. J. (2006) The Geology of England and Wales Geological Society of London ISBN 978-1-86239-200-7 p.63 in Google Books
- Musson, C. R.; Britnell, W. J.; Smith, A. G. (1991), The Breiddin Hillfort: A later prehistoric settlement in the Welsh Marches, Council for British Archaeology Research Report No 76, ISBN 1-872414-12-5
- BBC Wales feature on the Iron Age hillfort
- Photos of Breidden Hill and surrounding area on geograph
- Shropshire Geology website