5.0
(3)
96
hikers
9
hikes
Mountaineering around Llyn Dulyn is characterized by rugged mountain terrain, including prominent peaks and challenging scrambles within the Carneddau range. The landscape features steep ascents, rocky ridges, and glacial lakes, offering demanding routes for experienced mountaineers. This area is known for its exposed high-altitude environments and significant elevation gains.
Last updated: July 8, 2026
9
hikers
8.69km
03:50
580m
580m
Hard mountaineering route. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
36
hikers
6.74km
03:34
610m
610m
Hard mountaineering route. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required.

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5.0
(1)
24
hikers
7.22km
03:10
580m
580m
Hard mountaineering route. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
5.0
(1)
10
hikers
3.80km
02:44
550m
550m
Hard mountaineering route. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
5.0
(1)
6
hikers
7.64km
02:18
240m
240m
Moderate mountaineering route. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
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Huge angled boulder that you can see from the valley below. It can be climbed with care, but is polished these days.
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Rhaeadr Idwal is the scenic waterfall formed as the outflow of Llyn Idwal tumbles toward the Ogwen Valley. Cascading over ancient volcanic rock, it is a highlight of the approach path from Ogwen Cottage. Nearby, the Devil’s Appendix plunges 93 meters down the cliffs of Twll Du, making it the tallest single-drop waterfall in Wales. These falls are most dramatic after heavy rain or when frozen into spectacular ice columns in winter.
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Llyn Ogwen is a wonderful place - just avoid it at all costs on Bank Holiday weekends!!
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See this write up - https://www.komoot.com/tour/2449300285 It explains why this route is so good.
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This route is so much fun - and is part of what is probably the best grade 1 scramble in Snowdonia.
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The south ridge is the easier way to reach the top of Tryfan, but it still has it's moments near the top.
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The mountaineering routes around Llyn Dulyn are predominantly challenging. Out of 20 available routes, 16 are rated as difficult, with the remaining 4 being moderate. This area is known for its rugged mountain terrain, steep ascents, and rocky ridges within the Carneddau range, making it suitable for experienced mountaineers.
The duration of mountaineering routes around Llyn Dulyn varies depending on the specific trail and your pace. For example, the Tryfan Scramble – Tryfan Summit loop from Capel Curig typically takes around 3 hours 49 minutes to complete, while the longer Tryfan Summit – The Cantilever Stone loop from Tryfan can take over 5 hours 30 minutes.
The Llyn Dulyn area is primarily known for its demanding routes. There are no routes specifically classified as 'easy' for mountaineering. The available routes are rated as moderate to difficult, involving significant elevation gains and technical terrain, making them more suitable for those with some mountaineering experience.
For a truly challenging experience, consider the Pen Yr Ole Wen – Carnedd Llewelyn Summit loop from Tryfan. This extensive route covers nearly 20 km and involves significant elevation changes, offering a demanding day out in the mountains. Another challenging option is the Tryfan Scramble – Tryfan Summit loop from Tryfan, which includes a classic scramble to the summit.
Yes, parking is generally available at common starting points for routes in the Snowdonia National Park, such as near Capel Curig or specific lay-bys and car parks around the Tryfan area. It's advisable to arrive early, especially during peak season, as spaces can fill up quickly. Some car parks may require a fee.
The best time for mountaineering around Llyn Dulyn is typically from late spring to early autumn (May to October) when the weather is generally more stable, and daylight hours are longer. However, conditions can change rapidly in the mountains, so always be prepared for all types of weather, even in summer.
Winter mountaineering around Llyn Dulyn can be extremely challenging and requires significant experience, appropriate gear (including ice axe, crampons, and navigation skills), and a thorough understanding of avalanche risk. The high-altitude environment can experience severe weather, snow, and ice, making routes considerably more difficult and dangerous. Always check mountain forecasts and conditions before heading out.
For mountaineering in Llyn Dulyn, especially in autumn, you should bring sturdy waterproof boots, layered clothing (including a waterproof and windproof outer shell), a hat, gloves, and plenty of food and water. Given the challenging terrain, a helmet is recommended for scrambles, and a map, compass, and GPS device are essential for navigation. Always pack a headtorch, even for day trips, as conditions can change quickly.
Yes, several circular mountaineering routes are available. For instance, the Tryfan Summit loop from Tryfan offers a challenging circular journey through rocky mountain slopes. Many of the routes in the area are designed as loops, allowing you to return to your starting point without retracing your steps.
The Llyn Dulyn area is highly rated by the komoot community, with an average score of 4.8 stars from over 20 reviews. Mountaineers often praise the area for its rugged beauty, the challenging nature of its scrambles, and the rewarding views from the high peaks of the Carneddau range. The sense of achievement after tackling routes like Tryfan is a common highlight.
While many people enjoy hiking with their dogs, the mountaineering routes around Llyn Dulyn, particularly those involving scrambles and exposed ridges, can be very challenging for dogs. The terrain is rocky and steep, and there may be livestock grazing in the lower areas. If you do bring a dog, ensure it is fit, well-behaved, and capable of handling difficult terrain, and always keep it on a lead, especially near sheep.
While Llyn Dulyn itself is remote, nearby villages like Capel Curig, located a short drive away, offer cafes, pubs, and shops where you can refuel and relax after your mountaineering adventure. These establishments provide a welcome opportunity for refreshments and a warm meal.
There are 20 mountaineering routes available around Llyn Dulyn, offering a variety of challenging experiences within the Carneddau range. These routes are highly regarded by the komoot community for their rugged beauty and demanding terrain.


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