Roundton Hill is a rounded, steep sided, 1,210 feet (370 m) hill,[1] volcanic in origin,[1] in the easternmost part of old Montgomeryshire (in present day-Powys), Wales, which juts into the English border near Church Stoke.

[2] It is managed as a nature reserve by the Montgomeryshire Wildlife Trust,[3] who acquired it in 1985.

Lead and Barytes mines run into the hill,[3] and are today used as a roost by Horseshoe and Daubenton's bats.

[3] Having avoided the plough, the hill's steep rocky slopes still support plants such as the mountain pansy[citation needed], which has long since disappeared from most of the hills in mid-Wales[citation needed].

The reserve was made a Site of Special Scientific Interest (SSSI) in 1986.