Upper Corris, Machynlleth, SY20 9BU

Upper Corris is a locality situated in Mid‑Wales, near the town of Machynlleth. The area is notable for the Corris Railway, a narrow‑gauge railway that operated from Machynlleth, following the Dulas Valley north to Corris and on to Aberllefenni. The railway’s branches served the slate quarries at Corris Uchaf and Aberllefenni, indicating a historical connection to the local quarrying industry. The railway was based in Corris on the border between Merionethshire and Montgomeryshire, placing Upper Corris within a rural setting that historically benefited from this transport link. The postal district SY 20 places the locality within the broader postal area associated with Machynlleth. The description of the railway highlights the locality’s historical character and its relationship to the surrounding valley and quarrying heritage.