Snowdonia Mountain Loop — North Wales' Best Day Ride

North Wales packs more mountain road into a small area than anywhere else in the UK outside the Highlands. A 200km (125 mi) loop based out of Betws-y-Coed covers Snowdonia's headline passes — the Llanberis, the Beddgelert, the Crimea — without backtracking, and returns in time for a proper meal. It is the densest day's riding in Wales and one of the best in Britain.

The Route

Betws-y-Coed sits at a natural junction of the A5 and the A470 in the Conwy valley, with biker-friendly accommodation and easy access in any direction. From Betws the loop heads west on the A5 to Capel Curig — a short, fast warm-up through a wooded valley with good sightlines. At Capel Curig, turn south onto the A4086 for the Llanberis Pass.

The Llanberis Pass is the loop's headline section. The A4086 climbs to Pen-y-Pass at 359 metres, with Snowdon's eastern flank rising sharply on the right and the Glyderau on the left. The road is narrow but well-surfaced, the gradient is steady rather than steep, and the bends are open enough to flow at a moderate pace. The Pen-y-Pass car park fills quickly with hill walkers; an early start avoids the worst of the queue down toward Llanberis village.

From Llanberis village, drop west to Caernarfon on the A4086 then pick up the A4085 south through the Nantlle valley. This section is quieter than the headline passes — fewer tourist coaches, more forestry — and delivers a sustained run through some of Snowdonia's less-photographed but consistently fine landscape. The road meets the A498 at Beddgelert.

Beddgelert and the South Loop

Beddgelert is the hub of the southern Snowdonia ride. The village itself is small and tourist-oriented but the riding from it is excellent in three directions. The A498 north back to Pen-y-Pass via the Aberglaslyn pass is one of the tightest, most enjoyable stretches in the park — narrow river valley road following the Glaslyn through ancient oak woodland.

The southern leg drops from Beddgelert to Tremadog on the A498 through the Pass of Aberglaslyn, then turns east on the A487 toward Maentwrog and the Crimea Pass. The Crimea (A470) climbs from Blaenau Ffestiniog up over Bwlch y Gorddinan and down to Dolwyddelan — slate country, big skies, and a long open descent that closes the loop back toward Betws-y-Coed.

Practical Matters

Fuel is straightforward — Betws-y-Coed, Llanberis, Caernarfon, and Porthmadog all have stations. Mid-route between Beddgelert and the Crimea, the next reliable fuel is at Blaenau Ffestiniog. Sunday opening hours can be limited at the smaller stations.

The roads are popular with local riders, classic-car clubs, and tourist coaches in summer. North Wales Police are active around the headline routes — the A5 in particular has regular speed enforcement. The Llanberis and Aberglaslyn passes reward a measured pace for reasons of road width and pedestrian traffic rather than enforcement.

Weather is the variable that defines a Snowdonia ride. The mountains catch weather coming in off the Irish Sea and the passes can be in fog while the coast is clear. Pen-y-Pass and the Crimea Pass can be substantially colder than the valley floors. Pack layers and full waterproofs even on a forecast-fine summer day.

When to Go

April through October is the viable season. May and September offer the best balance — the days are long enough, the tourist traffic is manageable, and the weather is usually settled enough for a full loop. Mid-week through summer is fine if you start early; a 7am departure from Betws-y-Coed clears the Llanberis Pass before the first walker car parks fill.

Autumn (late September into October) brings excellent light through the oak woodland on the Aberglaslyn section and dramatic skies over the slate landscapes around Blaenau Ffestiniog. Winter riding is possible for experienced riders with suitable gear but the passes can be icy at altitude and daylight is short.

Where to Stay

Betws-y-Coed, Llanberis, Beddgelert, and Bala all have biker-aware accommodation with secure overnight parking. Welsh hosts in the riding regions tend to be relaxed about gear, early breakfasts, and the practicalities of a touring weekend. Pubs in Capel Curig and Beddgelert serve substantial food until reasonable hours, which suits a longer ride day.

Browse the full list of Welsh biker-friendly accommodation in our directory. The Snowdonia loop pairs naturally with a second day in the Brecon Beacons further south, or with a ferry crossing to Ireland from Holyhead for a longer trip.