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Snowdonia

Top 20 Mountain Passes in Snowdonia

Best mountain passes in Snowdonia, or Eryri, are renowned for their dramatic mountainous landscapes. The region features a variety of passes, each offering unique features and attractions. Snowdonia National Park is characterized by its rugged, rock-strewn terrain and significant mountaineering heritage. These passes provide access to prominent mountains and historical sites, making them central to the park's appeal.

Best mountain passes in Snowdonia

  • The most popular mountain passes include Cnicht Summit, a natural monument and viewpoint. This fantastically pointy,…

Last updated: July 23, 2026

Cnicht Summit

Highlight • Natural Monument

Nicknamed the Welsh Matterhorn, albeit 12,431 feet (3,789 m) lower than its Swiss counterpart, what Cnicht lacks in height it makes up in shapely attractiveness. It is a fantastically pointy, …

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Bwlch Glas Pass

Highlight • Natural Monument

The finger stone at Bwlch Glas marks the point at which the Pyg and Miners' Tracks reach the summit ridge and join the Crib Goch, Ranger and Llanberis Paths. Particularly helpful in poor visibility.

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Bwlch Main Ridge

Highlight • Trail

The narrow ridge of the Bwlch Main (Narrow Pass) is the highlight of the route. Although the ridge is not difficult, it is still exposed with steep slopes on either …

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Black Road Gravel Pass

Highlight (Segment) • Mountain Pass

This pass is an exceptional ride, particularly when the skies are clear. This gravel trail curves around the western extreme of Cadair Idris, bringing you high above the coast to …

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Bwlch y Groes

Highlight (Segment) • Mountain Pass

The second highest public road mountain pass in Wales this is definitely one to tick off the cycling bucket list. It is narrow and winding so it is recommended to …

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Clive G
October 10, 2025, Bwlch Main Ridge

The Bwlch Main (south west ridge) is a great way to descend from the summit of Snowdon, particularly on a winter's day. Great views all the way to the Irish Sea

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🥾Bwlch Main (Welsh: “narrow pass”) is the exposed ridge that connects the upper slopes of the Rhyd Ddu Path to the Snowdon summit. A narrow crest with steep drops on either side, making it both dramatic and challenging. The ridge is roughly 500–600m long and feels like a true alpine section compared with the grassy and stony lower parts of the trail. 👥 Quiet & scenic: Unlike the “motorway” feel of the Llanberis Path, Bwlch Main gives a real mountain experience with the thrill of exposure. For experienced hikers seeking an exhilarating experience, it significantly quieter (albeit much easier) than Crib Goch. 👁️‍🗨️ On a clear day you can see the Nantlle Ridge, Moel Hebog, and across to the sea. Looking north, Llyn Cwellyn and the ridges rolling out towards Anglesey. ⚠️ Dramatic ridgeline section: The path to the top of Snowdon from this ridge includes the Llechog ridge, which provide exposure (drops, narrower path sections) the narrow section gets to only a couple of feet wide. You will need a good head for heights! And some boots with good grips for some looser rock or scree sections. Check the mountain forecast before heading out 🌬️ In high winds, the ridge can feel intimidating and unsafe. 🌧️❄️In ice, snow, or heavy rain, the narrow path and sloping rock become treacherous. 😶‍🌫️ Cloud / fog can reduce visibility and make it psychologically harder. To sum up: The Bwlch Main ridge is one of Snowdon’s most thrilling features. It adds a real sense of adventure to the Rhyd Ddu Path. On a good day, it’s a highlight: airy, beautiful, and memorable without being a true scramble. But in poor weather, it can turn from exhilarating to dangerous very quickly. For experienced walkers in fair conditions, it’s one of the most rewarding routes to the summit. For those with vertigo or less mountain experience, it may be better admired from afar.

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Clive G
August 14, 2025, Cnicht Summit

Rainbows on mountains tend to be a mixed blessing as they are a pretty sure sign that you are about to get wet! However from the photographers point of view they can also signal some great light, with sun mixed in with dark moody clouds. This was the view from near the summit of Cnicht - otherwise sometimes called the Welsh Matterhorn due to its pointy appearance from the village of Croesor. To the right of the picture is Moel Hebog which rises steeply above the pictuesque village of Beddgelert.

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Clive G
August 14, 2025, Cnicht Summit

A fine rocky and in places narrow ridge, and you will often have it all to yourself!

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Beautiful hike, too bad it was cloudy at the top. 12.3 km isn't the actual distance you'll be hiking: it's definitely 10 km more because you can't walk a straight line on this path. It's very busy on this trail; there's a queue to reach the top.

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Crazy hiking all the way up and then seeing a train pass you on the final section!

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Great mountain road, rideable on a gravel, comfortable on an MTB

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This is the first proper off-road section on Traws Eryri heading north. If you're riding an MTB with nice big tyres it's a blast, but if you're on a gravel bike, it's a long, picky descent.

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Frequently Asked Questions

Which mountain passes are popular starting points for climbing Yr Wyddfa (Snowdon)?

Many of Snowdonia's mountain passes serve as excellent trailheads for Yr Wyddfa (Snowdon). Pen-y-Pass is a hugely popular starting point for the Miners' Track, Pyg Track, and the challenging ascent via Crib Goch. The Llanberis Path begins in Llanberis village at the foot of the Llanberis Pass, offering a more gradual ascent. Additionally, the Watkin Path, considered one of the best routes for experienced climbers, starts from the Nant Gwynant Pass.

What historical sites can I explore near Snowdonia's mountain passes?

Snowdonia's mountain passes are rich in history. The Llanberis Pass features the 13th-century medieval fortress of Dolbadarn Castle. Near Pen-y-Pass, the Pen-y-Gwryd hotel served as a training base for the 1953 Everest expedition team. In Nant Gwynant Pass, you can find Hafod Lwyfog, built in the 1540s, and the renovated Bethania Chapel from 1822. The Aberglaslyn Pass has a history of mining dating back to Roman times, with remnants still visible.

Are there family-friendly walks or activities in Snowdonia's mountain passes?

Yes, several passes offer options for families. The Aberglaslyn Pass features the picturesque Fisherman's Path, a generally well-maintained trail suitable for families, though some sections require care. Circular walks like the Aberglaslyn, Llyn Dinas and Cwm Bychan walk are also popular. The Llanberis Path, starting at the foot of Llanberis Pass, offers a more gradual ascent up Snowdon, which can be suitable for families seeking a longer walk.

What are some unique natural features to see in Snowdonia's mountain passes?

The passes showcase diverse natural beauty. The Llanberis Pass is known for its rugged, rock-strewn landscape and impressive crags popular with rock climbers. Nant Gwynant Pass, a deep glacial valley, leads past two tranquil lakes, Llyn Dinas and Llyn Gwynant, nestled beneath Mount Snowdon. The Aberglaslyn Pass is a picturesque wooded gorge where the Afon Glaslyn river tumbles through, creating numerous waterfalls.

Where can I find the best viewpoints in Snowdonia's mountain passes?

Many passes offer stunning vistas. The Llanberis Pass provides dramatic views, especially when descending towards Llanberis. The Nant Gwynant Pass offers breathtaking views as the A498 road descends into the valley. Cnicht Summit, nicknamed the 'Welsh Matterhorn', offers wonderful panoramic views. Bwlch Main Ridge also provides an exposed route with expansive views on both sides.

What outdoor activities can I do near Snowdonia's mountain passes?

Beyond hiking, Snowdonia's mountain passes are gateways to various outdoor adventures. You can enjoy watersports like windsurfing and canoeing on Llyn Gwynant in the Nant Gwynant Pass. The region also offers extensive cycling opportunities, including mountain biking trails and road cycling routes. For more information on cycling, you can explore the MTB Trails in Snowdonia, Road Cycling Routes in Snowdonia, and Cycling in Snowdonia guides.

Are there challenging mountain passes for experienced hikers and climbers?

Absolutely. For experienced adventurers, the ascent via Crib Goch from Pen-y-Pass is a challenging scramble. The Watkin Path, starting from Nant Gwynant Pass, is also considered one of the best routes up Snowdon for experienced climbers. Bwlch Main Ridge offers an exposed route with steep slopes, while Bwlch Tryfan is a starting point for the South Ridge scramble to Tryfan's summit and the trickier Bristly Ridge to Glyder Fach.

What is the significance of <a href="https://www.xenvaroqil.info/highlight/3886265" target="_blank" rel="noopener">Bwlch Glas Pass</a>?

Bwlch Glas Pass is a crucial meeting point on Yr Wyddfa (Snowdon). It marks where the Pyg and Miners' Tracks converge with the Crib Goch, Ranger, and Llanberis Paths on the summit ridge. A finger stone at this location helps with navigation, especially in poor visibility, making it a well-known landmark for hikers ascending Snowdon.

What amenities are available near the mountain passes?

Amenities vary by pass. Pen-y-Pass has an information center, a café, and a YHA youth hostel. The Pen-y-Gwryd hotel nearby also offers accommodation and a historic Everest Room. In Nant Gwynant Pass, Llyn Gwynant has a campsite, and the Bethania Chapel has been renovated into a café. Llanberis village, at the foot of Llanberis Pass, offers various facilities.

How can I access the mountain passes, especially regarding parking?

Access to the passes is generally by road, with the A4086 running through Llanberis Pass and the A498 through Nant Gwynant. Parking at popular spots like Pen-y-Pass often requires advance booking, especially during peak seasons. A park-and-ride bus service is available for Pen-y-Pass to manage visitor numbers. It's advisable to check specific parking requirements before your visit.

What do visitors enjoy most about Snowdonia's mountain passes?

Visitors frequently praise the dramatic mountainous landscapes and breathtaking views. The passes are appreciated for providing access to prominent mountains like Yr Wyddfa (Snowdon) and Glyder Fawr, as well as offering a diverse range of experiences from challenging ascents to tranquil lakeside walks. The rich mountaineering heritage and historical sites also add to the appeal, making them central to the charm of Snowdonia National Park.

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See even more epic mountain passes by checking out these guides in Snowdonia:

LlanberisBeddgelertLlanllechidLlandygaiBetws GarmonLlanddeiniolenLlanelltydDolgellauLlanfrothenFfestiniogAberDolbenmaenWaunfawrLlanllyfniMawddwyLlanfihangel-Y-PennantArthogBrithdir And LlanfachrethLlangywerCorrisLlandderfelLlanuwchllynGanllwydLlanwndaLlanrugLlandwrogLlanycilDyffryn ArdudwyBarmouthTrawsfynyddMaentwrogTalsarnauBethesdaBala

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