Bwlch-y-Ddeufaen

Bwlch-y-Ddeufaen (Welsh for 'gap/pass of the two stones') is a mountain pass in Conwy county borough, north Wales, traversable only on foot or horseback, following the former Roman road from Caerhun (Canovium) to Caernarfon (Segontium).

The route may be followed by road to Rowen or to Llanbedr-y-Cennin and from either, the way, through a mountain gate, is a clearly marked green path to Abergwyngregyn.

On the mainland side, the route was part of the network of drovers' roads that reached all the major centres of population in Wales and England.

Cattle, sheep and even geese were regularly driven that way on foot down the ages to 1850 or even later, quite often as far as London, which was the largest market in Britain.

of 1777 to reconstruct this ancient Roman road from Tal-y-Cafn via Bwlch-y-Ddeufaen over the high pass to Abergwyngregyn but they failed to carry out the work.