A shorter, sharper UK trip than the Lake District or Skye runs in this series: Wales's highest mountain, a genuine rack-and-pinion railway to its summit, real slate-mining heritage in Llanberis, and a round trip that stays comfortably under 1,700 km — with Zip World's former-quarry zipline right next door as a natural add-on.
Yr Wyddfa / Snowdon (1,085 m) is the highest peak in Wales and the highest point in the UK outside the Scottish Highlands — a real mountain day, but one with an unusual option: the Snowdon Mountain Railway, the only public rack-and-pinion railway in Britain, has been hauling passengers to the summit since 1896. You can hike up and ride down, ride up and hike down, or do the whole thing on foot — genuinely rare flexibility for a mountain this size. Llanberis itself sits on real slate-mining history: the National Slate Museum, housed in the former Dinorwic Quarry workshops, and — as covered in the sibling Zip World trip in this series — the world's fastest zipline is built into that same disused slate quarry a short drive away at Penrhyn/Bethesda.
Sources: leshuttle.com, dfds.com, directferries.com — genuinely dynamic pricing, re-check before booking.
Meudon-la-Forêt to Calais is the same ~290 km run used throughout this series. From Folkestone, Llanberis is roughly 520–530 km up the M20/M25/M40 corridor, across the Midlands via the M6, then along the A55 "Expressway" that hugs the North Wales coast before cutting south to Llanberis — a genuinely scenic final stretch with the sea on one side and Snowdonia's peaks rising on the other. All told it's roughly 810–830 km one-way from Meudon-la-Forêt, noticeably shorter than the Lake District (~1,000 km) or Skye runs in this series, and comfortably doable with one overnight split rather than a brutal single push.
On a 97%-SOH Model Y Premium realistically doing 330–370 km per charge, the ~520–530 km Folkestone-to-Llanberis run now needs only one mandatory Supercharger stop, not the two or three an older, shorter-range car would have required. The natural single stop is Rugby or Corley Services (M6) through the Midlands, roughly 280 km in — a full charge there leaves a comfortable ~250 km to Llanberis. Maidstone/Ashford (Kent), only ~50 km off the ferry, is now optional — a quick top-up if you'd rather split the charging into two shorter stops than one longer one. The closest reliable Supercharger to Snowdonia itself is around Chester, roughly 100–110 km short of Llanberis; it's no longer strictly needed after a full Rugby/Corley charge, but it's a sensible optional buffer since charging infrastructure thins out noticeably once you're off the A55 and into the national park, and Welsh mountain roads and elevation gain eat into range faster than motorway driving. Public CCS/GridServe chargers exist in Llanberis and Caernarfon as a slower backup.
Sources: Tesla Supercharger network / Find Us tool, supercharge.info, standard M6/A55 route data.
Given the same narrow margin as the Lake District trip, the plan below leans on a real paid campsite for convenience, reserving the high-mountain tolerance only for a single summit-adjacent night if conditions and daylight genuinely allow it.
Reflects widely-documented informal UK hillwalking practice (e.g. Snowdonia National Park Authority / Eryri visitor guidance and mountain rescue advice on responsible wild camping) — not an official blanket policy.
Early motorway run to Calais-Coquelles, load onto the Shuttle, remember to keep left. No charging needed for the ~290 km run to Calais. Push on toward the Midlands and charge fully near Rugby or Corley — that one stop covers the rest of the way to Llanberis; Maidstone/Ashford is an optional early top-up only if you'd rather split it into two shorter stops. Overnight at a quiet Park4Night-listed spot or a budget campsite near the M6 — the UK has nothing like France's Aire network, so plan ahead.
Long push through to Chester for an optional buffer charge (you may already have enough from the Rugby/Corley stop, but infrastructure thins out beyond here), then the genuinely scenic A55 Expressway along the North Wales coast (Colwyn Bay, Conwy's castle visible from the road) before cutting south into the mountains toward Llanberis. Settle into a paid campsite for the next couple of nights (see budget below) and take an easy evening walk along Llyn Padarn, the lake right at the edge of the village.
Sources: snowdonrailway.co.uk, Snowdonia National Park Authority trail guidance, Wikipedia (Snowdon, Snowdon Mountain Railway) — railway fares are seasonal, verify before booking.
A recovery morning at the National Slate Museum, housed in the original workshops of the former Dinorwic Quarry (once one of the largest slate quarries in the world) right on the shore of Llyn Padarn — free entry, real working waterwheel (the Foel Fawr wheel, one of the largest in mainland Britain), and genuine insight into the industry that shaped this whole valley. This is also the direct link to the sibling Zip World trip: its record-breaking zipline runs through a different disused slate quarry nearby, so anyone doing both trips is tracing the same industrial landscape from two very different angles. Use the rest of the day as a weather buffer, an easy bike ride around Llyn Padarn, or a paddle if you brought anything for the lake.
Sources: museum.wales/slate (Amgueddfa Cymru — National Museum Wales, all national museums free entry), standard North Wales pub-menu pricing.
The run home, with a full charge at Corley/Rugby (Chester and Maidstone/Ashford again optional buffers) covering the reverse route, Shuttle or ferry back across the Channel, and the final leg to Meudon (no charging needed for the last ~290 km). As on the outbound run, most people will prefer to split this into two days rather than one long push.
Llanberis sits at the foot of the Llanberis Path and right next to Llyn Padarn's lakeside path — an easy, flat spin for a rest-day ride. Coed y Brenin and other purpose-built mountain-bike centres are within striking distance further south if you want a proper trail day. Bike loaded inside per the Car Camping & Bike Guide, no range penalty on the motorway legs.
| Category | Cost |
|---|---|
| Fuel-equivalent charging (France + England/Wales, ~1,650 km round trip) | ≈ €95–130 |
| French tolls (Meudon–Calais return) | ≈ €55–70 |
| Eurotunnel Le Shuttle, return, booked ahead off-peak | ≈ £150–220 (≈ €175–260) |
| Lodging (2–3 nights paid campsite near Llanberis ≈£15–20/night, 1 free high-mountain night, 1–2 roadside stops) | ≈ €45–75 |
| Snowdon Mountain Railway (optional, one way up) | ≈ £30–55 (≈ €35–65) |
| National Slate Museum | €0 (free entry) |
| Cawl / Welsh rarebit splurge dinner | ≈ £10–15 (≈ €12–18) |
| Food (self-cooked, ~5 days) | ≈ €50–65 |
| Total | €380–520 |
Ferry/tunnel and charging costs are genuinely dynamic — re-check nearer your travel dates. Rate used: £1 ≈ €1.17 (July 2026, approximate). Total excludes the optional railway fare if you hike both ways instead.