User: Where is the mountain pass Pen-y-Pass
Assistant: Pen-y-Pass is a mountain pass in Snowdonia, Gwynedd, north-west Wales. It is a popular location from which to walk up Snowdon, as three of the popular routes (the Miners Track, the Pyg Track and the ascent via Crib Goch) can be started here. Glyder Fawr, to the north, is also accessible from here.

Situated at the high point of the Llanberis Pass at an elevation of 359 metres (1,178 ft) – about a third of the height of Snowdon – the road was built in the 1830s to allow ore from the mines on Snowdon to be transported to Llanberis. It would be taken down the Miners Track to a store-house at Pen-y-Pass first. Previously, the miners had had to move the ore over the Snowdon summit and down to Beddgelert, which is located at around a third the height of Snowdon.