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Routes
Mountain Hikes
United Kingdom
Wales
North Wales
Gwynedd

Llyn Cwellyn

The best mountain hikes around Llyn Cwellyn

4.9

(16)

138

hikers

8

hikes

Mountaineering around Llyn Cwellyn, situated within Eryri National Park, is characterized by a deep glacial valley and rugged mountain slopes. The area features prominent peaks like Snowdon (Yr Wyddfa) to the east and Mynydd Mawr to the west, offering diverse ascents. Dramatic cliffs and ridges, such as those above Llyn Cwellyn on Snowdon's shoulder, provide challenging terrain and extensive views. This landscape, shaped by glacial activity, presents a variety of mountaineering routes for different skill levels.

Best mountaineering routes around…

Last updated: April 25, 2026

5.0

(3)

13

hikers

#1.

Snowdon Ranger Path – Snowdon Summit (Yr Wyddfa) loop from Snowdon Ranger

12.9km

05:02

890m

890m

Hard mountaineering route. Very good fitness required. Mostly accessible paths. Sure-footedness required.

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Hard

Hard mountaineering route. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required.

Hard
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Hard mountaineering route. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required.

Hard

Hard mountaineering route. Very good fitness required. Mostly accessible paths. Sure-footedness required.

Hard

Hard mountaineering route. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.

Hard
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Tips from the Community

Dominiek Van Dooren
May 6, 2026, Start of the Rhyd Ddu Bridleway

I don't know if this is a bridle path or not. This is in any case the start of the Rhyd-ddu path to the summit of Snowdon. It starts at the Rhyd-ddu station of the Welsh Highland Railway, where ample paid parking is available.

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Depending on fitness levels this route on average takes around 5hrs up and down.

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Mike
November 1, 2025, Snowdon Ranger Hostel

I think the start and the end is probably the hardest but overall pretty easy path you can’t get lost

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The best view to be had of these two lakes is from the Crib Goch, and they will be a long way below you.

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Great view of the lake and the climb to come , stopped for a quick brew before the ascent up

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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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Solid path underfoot here

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Llechog (Welsh for “slaty place”) is a long, rocky summit ridge that rises above the village of Rhyd Ddu. It’s not a separate mountain peak, but a prominent shoulder of Snowdon, forming the steep cliffs above Llyn Cwellyn. Pass over or alongside Llechog before continuing along the narrow Bwlch Main ridge to reach the summit of Snowdon. 👁️‍🗨️ Spectacular cliffs: Sheer drops plunge hundreds of metres into the valley below. It’s one of Snowdon’s most dramatic natural features. Views westward: Over Llyn Cwellyn and the forested valley, with Moel Hebog and the Nantlle Ridge in the distance. On a clear day, you can see all the way to the sea. Looking ahead, the razor crest of Bwlch Main. 👥 Not as popular as other routes, you are likely to get the path to yourself. ⚠️ More exposed and dramatic than the lower Rhyd Ddu approach, but easier than the knife-edge ridge sections of Crib Goch. The cliffs drop steeply to the west, so straying off-path could be very dangerous. 🌬️ In windy weather, this section feels more serious than the lower Rhyd Ddu slopes. Strong winds can funnel along the ridge, adding to the exposure 😶‍🌫️ The path is fairly clear in good visibility, but in cloud it’s easy to drift too close to the edge. ❄️ In winter, cornices and ice build-up on the cliff edge pose real risks.

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Frequently Asked Questions

What kind of mountaineering routes can I expect around Llyn Cwellyn?

Llyn Cwellyn offers a range of mountaineering experiences, primarily characterized by challenging ascents to prominent peaks like Snowdon (Yr Wyddfa) and routes along the Nantlle Ridge. The terrain is rugged, featuring dramatic glacial valleys, steep mountain slopes, and impressive ridges, suitable for those with good fitness and some alpine experience.

How many mountaineering routes are available in the Llyn Cwellyn area?

There are over a dozen dedicated mountaineering routes around Llyn Cwellyn, with 15 routes currently available on komoot. These routes cater to various levels of difficulty, though most are classified as difficult, offering significant challenges and rewarding views.

Are there any moderate mountaineering routes for those looking for a less intense challenge?

While most mountaineering routes around Llyn Cwellyn are classified as difficult, there is at least one moderate route available. This allows for a slightly less strenuous introduction to the region's mountain landscapes, though it still requires a good level of fitness.

What do other mountaineers say about the routes in Llyn Cwellyn?

The mountaineering routes around Llyn Cwellyn are highly regarded by the komoot community, boasting an average rating of 4.7 stars from over 25 reviews. More than 200 mountaineers have explored this area using komoot, often praising the challenging terrain and the stunning views of the glacial valley and surrounding peaks.

Which mountains can I summit from Llyn Cwellyn?

From Llyn Cwellyn, you can access routes to several significant peaks. Most notably, the area serves as a key starting point for ascents to Snowdon (Yr Wyddfa), Wales' highest mountain. You can also explore routes leading to summits on the Nantlle Ridge, such as Y Garn, and the Moel Hebog range.

Are there any circular mountaineering routes in the Llyn Cwellyn area?

Yes, several circular mountaineering routes are available. For instance, you could tackle the Snowdon Summit loop from Snowdon Ranger, which starts near the lake and offers a challenging ascent and descent. Another option is the Y Garn Summit (Nantlle Ridge) – Mynydd Drws-y-Coed loop from Rhyd-ddu, providing a comprehensive exploration of the Nantlle Ridge.

What are some of the natural features I'll encounter on mountaineering routes near Llyn Cwellyn?

Mountaineering routes around Llyn Cwellyn will immerse you in a landscape shaped by glacial activity. You'll encounter the deep glacial lake itself, dramatic cliffs and ridges, and rugged mountain slopes. The area is flanked by the majestic Snowdon Massif and Mynydd Mawr, offering spectacular views across the valley and, on clear days, even to the sea.

How can I reach the trailheads for mountaineering routes around Llyn Cwellyn using public transport?

The Sherpa'r Wyddfa bus service is a convenient option for reaching many trailheads around Llyn Cwellyn. This service stops at the starting points for all six routes to Snowdon's summit, including the popular Snowdon Ranger Path, which begins directly from the shores of Llyn Cwellyn.

Are there any family-friendly mountaineering routes or easier walks near Llyn Cwellyn?

While most mountaineering routes in the immediate Llyn Cwellyn area are challenging, there are less strenuous options available for families or those seeking gentler walks. The region offers scenic lakeside paths and moderate walks, such as the Lake of the Servant's Spring – Bwlch Maesgwm loop, which provide beautiful views without the extreme difficulty of the higher mountain ascents.

What is the typical duration for a mountaineering route in Llyn Cwellyn?

The duration for mountaineering routes around Llyn Cwellyn varies depending on the specific trail and your pace. For example, the Snowdon Summit loop from Rhyd-ddu typically takes around 4 hours 48 minutes, while the Moel Hebog – Moel Yr Ogof loop from Beddgelert can take closer to 5 hours 38 minutes. Most difficult routes will require a significant portion of your day.

Where can I find parking for mountaineering routes near Llyn Cwellyn?

Parking facilities are available at key trailheads around Llyn Cwellyn, particularly for popular routes like the Snowdon Ranger Path. It's advisable to arrive early, especially during peak season, as spaces can fill up quickly. Some routes, like those starting from Rhyd-ddu, also have designated parking areas.

Are there any specific viewpoints I should look out for on mountaineering routes?

Many mountaineering routes around Llyn Cwellyn offer breathtaking viewpoints. From elevated positions on Snowdon's shoulder, such as Llechog, you can enjoy expansive views across Llyn Cwellyn and the forested valley towards Moel Hebog and the Nantlle Ridge. The summits themselves, like Snowdon and Y Garn, provide panoramic vistas of the entire Eryri National Park.

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