Caernarfon Castle and Town Walls and Harlech Castle
Plan this ride
Recorded distance
218 km
Riding-time estimate
3 h 46
Journey
Recorded itinerary
Distance and timing basis
The recorded total and the leg detail need reconciliation. Inspect the leg notes before using this record for timing or navigation. Stops, delays, approach and any separate return travel add time. Basis: producer-declared routed record.
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Distance and riding time are measured on the routed road. Check local closures and conditions before you ride.
218 km from Caernarfon to Caernarfon, about 3 h 46 of riding. The stops in between: Beaumaris Castle, Ffestiniog: its Slate Mines and Quarries, Harlech Castle and back through Ffestiniog: its Slate Mines and Quarries. The line favours views over speed.
Scenic road chapters
Snowdonia Llanberis Pass
Speed drops and stays down. Park rather than crawl through. 43 km through ground somebody thought worth listing. The road passes it rather than bypassing it.
Rider note
Check the pass is open before you commit to it.
Chapter facts
Length
43 km
Named road
Snowdonia Llanberis Pass
Pass
Pen y Pass
Waypoint introductions and full write-ups
1. Caernarfon Castle and Town Walls
Long before Edward, Caernarfon was Roman, and before that it was legend. The Roman fort of Segontium stood on a hill above the modern town, a garrison post guarding the Menai Strait and the copper of Anglesey, and its foundations can still be seen, with a small museum beside them. The Mabinogion, the medieval Welsh story collection, tells how the emperor Macsen Wledig, the historical Magnus Maximus, dreamed of a beautiful maiden and a fortress at the mouth of a river, and travelled across the world to find them. The place he found, in the tale, was Caernarfon. Whatever the truth, Welsh tradition ties the town to a sense of ancient dignity.
May refer to an earlier itinerary; verify against your selected route before riding.
Planning note
Caernarfon Castle and Town Walls is where the day begins. Next is Beaumaris Castle.
2. Beaumaris Castle
Beaumaris is often called the most perfect castle never finished. Edward I began it in 1295 on the shore of Anglesey, at the northern entrance to the Menai Strait, as the last of his great chain of fortresses built to hold down Wales after his conquest. His architect, Master James of St George, designed it as a perfectly symmetrical concentric castle: an inner ring of high walls and towers, an outer ring of lower walls, and a moat linked to the sea so that supply ships could sail up to a dock at the gate. Money ran out, the Scottish wars took priority, and the towers never reached their planned height. Even so, it is a masterpiece of military design, and with the castles of Conwy, Caernarfon and Harlech it is listed by UNESCO.
May refer to an earlier itinerary; verify against your selected route before riding.
Planning note
Beaumaris Castle comes up 31 km in. Next is Ffestiniog: its Slate Mines and Quarries.
3. Ffestiniog: its Slate Mines and Quarries
Blaenau Ffestiniog is a town built on, among and out of slate. Great grey tips of waste rock tumble down the mountainsides around it, old quarry inclines climb the slopes, and the houses, chapels and walls are all made of the same dark stone. For a century and more this was one of the slate capitals of the world, roofing houses from London to Melbourne, and since 2021 it has been part of the UNESCO-listed Slate Landscape of Northwest Wales. It is not pretty in the conventional sense, but it is magnificent, and on a day of sun breaking through rain clouds it can look like a lunar landscape lit by spotlights.
May refer to an earlier itinerary; verify against your selected route before riding.
Planning note
62 km in you reach Ffestiniog: its Slate Mines and Quarries. Next is Harlech Castle.
4. Harlech Castle
When Edward I built his castles in Wales, he was not interested in subtlety. Harlech, raised between 1283 and 1289 by the master mason James of St George, sits on a rocky crag above the dunes of Cardigan Bay, with concentric walls, massive gatehouse and round towers that still look ready for a siege. It is one of the castles of Edward I in Gwynedd listed by UNESCO, together with Caernarfon, Conwy and Beaumaris. The sea once came almost to the foot of the rock, and a staircase down the cliff allowed the garrison to be supplied by boat; the coast has since moved, and now there is a broad plain of dunes and a golf course between the castle and the water.
May refer to an earlier itinerary; verify against your selected route before riding.
Planning note
Caernarfon Castle and Town Walls closes the day.
Leg by leg
Caernarfon Castle and Town Walls to Beaumaris Castle
Caernarfon Castle and Town Walls → Beaumaris Castle is 25 km of rhythm rather than effort. Let it flow and let the view breathe.
Beaumaris Castle to Ffestiniog: its Slate Mines and Quarries
Beaumaris Castle → Ffestiniog: its Slate Mines and Quarries is 43 km of rhythm rather than effort. Let it flow and let the view breathe.
Ffestiniog: its Slate Mines and Quarries to Harlech Castle
Ffestiniog: its Slate Mines and Quarries → Harlech Castle is 25 km of rhythm rather than effort. Let it flow and let the view breathe.
Harlech Castle to back through Ffestiniog: its Slate Mines and Quarries
Harlech Castle → back through Ffestiniog: its Slate Mines and Quarries is 25 km of rhythm rather than effort. Let it flow and let the view breathe.
back through Ffestiniog: its Slate Mines and Quarries to back through Beaumaris Castle
back through Ffestiniog: its Slate Mines and Quarries → back through Beaumaris Castle is 43 km of rhythm rather than effort. Let it flow and let the view breathe.
back through Beaumaris Castle to Caernarfon Castle and Town Walls
back through Beaumaris Castle → Caernarfon Castle and Town Walls is 25 km of rhythm rather than effort. Let it flow and let the view breathe.