Corndon Hill

Corndon Hill (Welsh: Cornatyn) is a hill in Powys, Mid Wales, whose summit rises to 513.6 metres (1,685 ft) above sea level. It has a topographic prominence of 203.1 metres (666 ft), so is listed as a Marilyn.

It is surrounded on three sides by the English county of Shropshire, and forms a prominent landmark in the England–Wales border. Corndon's prominent western edge appears to form a separate hill and is known locally as Lan Fawr (Welsh: 'Big Hill'). It is frequented by walkers and ramblers from car parks nearby, at Mitchell's Fold for example. There are spectacular panoramic views from the summit, and it is itself an important landmark for the surrounding countryside and towns like Montgomery. It is close to villages such as Church Stoke and Hyssington.

The hill is geologically part of the Shropshire Hills range, which lies mainly to the north, east and south of the summit. The immediate area to the west is the Vale of Montgomery and the River Severn. The Cambrian Mountains are visible beyond to the far west. The Stiperstones and Shelve lie to the immediate north-east, with Caer Caradoc and the Long Mynd to the east.