Bryneglwys Slate Quarry and Pontcysyllte Aqueduct and Canal
Plan this ride
Recorded distance
369 km
Riding-time estimate
6 h 15
Journey
Recorded itinerary
Distance and timing basis
Ordered leg totals agree within rounding. Stop distances are approximate sums of rounded legs. Stops, delays, approach and any separate return travel add time. Basis: producer-declared routed record.
Reading history stays on this device. My road watch requires a separate selection; opening it does not subscribe this ride.
Distance and riding time are measured on the routed road. Check local closures and conditions before you ride.
From Corris it runs 369 km to Corris; allow about 6 h 15 of riding. The stops in between: Nantlle Valley Slate Quarry Landscape, Pontcysyllte Aqueduct and Canal and back through Nantlle Valley Slate Quarry Landscape. It suits an unhurried touring pace.
Waypoint introductions and full write-ups
1. Bryneglwys Slate Quarry
High above the village of Abergynolwyn, in a side valley where the sheep outnumber everyone, the spoil heaps of Bryneglwys tell you that this quiet corner of southern Snowdonia was once an industrial place. Slate was cut here through the second half of the nineteenth century and into the twentieth, and the whole reason the little Talyllyn Railway exists is to carry it down the valley to the coast at Tywyn. The quarry finally closed just after the Second World War, and the railway, which should have died with it, was taken over by volunteers in 1951 and became the first preserved railway in the world. You can still walk up from the old incline at Nant Gwernol into the quarry workings, past roofless barracks and wheel pits, with streams running through all of it.
May refer to an earlier itinerary; verify against your selected route before riding.
Planning note
Bryneglwys Slate Quarry is where the day begins. Next is Nantlle Valley Slate Quarry Landscape.
2. Nantlle Valley Slate Quarry Landscape
Look at the Nantlle valley from the road and you see a green bowl with a ragged grey edge, as if someone had bitten the mountain. It is a place where the quarrying went down instead of along. The pits here are enormous, cut deep below the level of the lakes, with sheer sides, and the biggest of them, the Dorothea, became a flooded hole of cold green water. On the skyline, tips of waste slate lean against each other like broken plates. This is part of the slate landscape of north-west Wales that UNESCO listed in 2021, and the quarries here are among the oldest in the area, producing roofing slate from the eighteenth century and earlier.
May refer to an earlier itinerary; verify against your selected route before riding.
Planning note
Nantlle Valley Slate Quarry Landscape comes up about 81 km into the recorded legs. Next is Pontcysyllte Aqueduct and Canal.
3. Pontcysyllte Aqueduct and Canal
You hear it before you understand it: water running in an iron trough thirty-eight metres above the River Dee, on stone piers so slender they look drawn rather than built. Thomas Telford and William Jessop finished the Pontcysyllte Aqueduct in 1805 to carry what is now the Llangollen Canal across the valley, and more than two centuries later narrowboats still glide over it, steered by people trying very hard not to look down. There is a towpath on one side with railings; on the other side there is only the edge of the trough and air. Walk across if you have a head for heights. It is one of the strangest and best ten minutes in Wales.
May refer to an earlier itinerary; verify against your selected route before riding.
Planning note
Back at Bryneglwys Slate Quarry. That is the ride.
Leg by leg
Bryneglwys Slate Quarry to Nantlle Valley Slate Quarry Landscape
Bryneglwys Slate Quarry → Nantlle Valley Slate Quarry Landscape is 81 km of getting across. Ride it tidily and keep the enthusiasm for what comes after.
Nantlle Valley Slate Quarry Landscape to Pontcysyllte Aqueduct and Canal
Nantlle Valley Slate Quarry Landscape → Pontcysyllte Aqueduct and Canal is 103 km of getting across. Ride it tidily and keep the enthusiasm for what comes after.
Pontcysyllte Aqueduct and Canal to back through Nantlle Valley Slate Quarry Landscape
Pontcysyllte Aqueduct and Canal → back through Nantlle Valley Slate Quarry Landscape is 103 km of getting across. Ride it tidily and keep the enthusiasm for what comes after.
back through Nantlle Valley Slate Quarry Landscape to Bryneglwys Slate Quarry
back through Nantlle Valley Slate Quarry Landscape → Bryneglwys Slate Quarry is 81 km of getting across. Ride it tidily and keep the enthusiasm for what comes after.