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Routes
Mountain Hikes
United Kingdom
Wales
North Wales
Conwy

Llyn Ogwen

The best mountain hikes around Llyn Ogwen

4.9

(9)

177

hikers

12

hikes

Mountaineering around Llyn Ogwen is characterized by dramatic landscapes and challenging terrain within Snowdonia National Park. The region is flanked by the Carneddau and Glyderau ranges, featuring iconic peaks such as Tryfan, Glyder Fach, Glyder Fawr, and Pen yr Ole Wen. This area is defined by rugged, rocky terrain, steep-sided valleys, and glacial lakes like Llyn Ogwen and Llyn Idwal. The Ogwen Valley offers a diverse environment for various mountaineering experiences.

Best mountaineering routes around Llyn Ogwen

  • The most popular mountaineering route is Pen Yr Ole Wen – Carnedd Llewelyn Summit loop from Tryfan, a 12.1 miles (19.5 km) trail that takes 6 hours 46 minutes to complete. This challenging route offers significant elevation gain and panoramic views across the Carneddau range.
  • Another top favourite among local mountaineers is Castell Fawr rock formation – Parc Cenedlaethol Eryri loop from Tryfan, a difficult 6.2 miles (10.0 km) path. This route explores the rugged terrain around Tryfan, providing views of the Castell Fawr rock formation.
  • Local mountaineers also love the Tryfan Scramble – Tryfan Summit loop from Tryfan, a 3.2 miles (5.2 km) trail leading through the iconic Tryfan mountain, often completed in about 3 hours 6 minutes.
  • Mountaineering around Llyn Ogwen is defined by towering mountains, rugged terrain, and glacial lakes. The network offers options for different ability levels, from challenging scrambles to demanding summit ascents.
  • The routes in Llyn Ogwen are highly rated by the komoot community with an average score of 4.8 stars from over 20 reviews. More than 290 mountaineers have used komoot to explore Llyn Ogwen's varied terrain.

Last updated: May 11, 2026

35

hikers

#1.

Tryfan Summit – View of Tryfan loop from Tryfan

6.88km

03:35

610m

610m

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

Hard

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

Hard
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Popular around Llyn Ogwen

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Hiking Collection by

Alex Foxfield

Tips from the Community

Clive G
March 25, 2026, Llyn Ogwen

Beautiful lake, but avoid the area at Easter!

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Clive G
February 19, 2026, Cannon Stone (Tryfan)

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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MCW73
January 9, 2026, Afon Idwal Waterfall

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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Clive G
October 27, 2025, Glyder Fawr Summit

A wonderful spiky summit with fine views to Yr Wyddfa and into Ogwen Valley. The summit itself is a scramble over very large jumbled boulders.

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Clive G
October 12, 2025, View of Llyn Ogwen

Llyn Ogwen is a wonderful place - just avoid it at all costs on Bank Holiday weekends!!

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Clive G
October 12, 2025, Tryfan Scramble

See this write up - https://www.komoot.com/tour/2449300285 It explains why this route is so good.

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Clive G
October 12, 2025, Tryfan North Ridge

This route is so much fun - and is part of what is probably the best grade 1 scramble in Snowdonia.

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Clive G
October 12, 2025, Tryfan South Ridge

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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Frequently Asked Questions

How many mountaineering routes are available around Llyn Ogwen?

There are over 10 distinct mountaineering routes available around Llyn Ogwen, offering a range of challenges within the dramatic landscapes of Snowdonia National Park. The komoot community has explored these routes over 290 times, highlighting their popularity.

Are there routes suitable for beginners or those new to mountaineering in Llyn Ogwen?

While many routes in Llyn Ogwen are challenging, there are options for those newer to mountaineering. For instance, the region offers routes that provide stunning views without requiring the most strenuous summit climbs, such as the Llyn Ogwen circular walk mentioned in regional context. Always check the difficulty grade for specific tours on komoot.

What kind of terrain can I expect on mountaineering routes around Llyn Ogwen?

Mountaineering routes around Llyn Ogwen are characterized by rugged and dramatic terrain. You can expect rocky peaks, steep-sided valleys, and glacial features. The area is flanked by the Carneddau and Glyderau ranges, offering diverse landscapes from challenging scrambles to demanding summit ascents.

Are there any particularly challenging mountaineering routes in the Llyn Ogwen area?

Yes, Llyn Ogwen is renowned for its challenging ascents and scrambles. Routes like the Tryfan Scramble – Tryfan Summit loop from Tryfan and the Bristly Ridge – The Cantilever Stone loop from Tryfan are considered difficult and require good fitness and sure-footedness. The Glyderau horseshoe is also a challenging and rewarding journey.

Is parking available for mountaineering routes near Llyn Ogwen?

Yes, several car parks are available around Llyn Ogwen, though they can fill up quickly during peak times. Ogwen Visitor Centre and Snack Bar is a key hub with parking, and there's also a Free Parking Area in Eryri National Park nearby.

Can I reach the mountaineering routes around Llyn Ogwen by public transport?

The A5 road runs alongside Llyn Ogwen, providing convenient access. While specific bus routes aren't detailed in our data, public transport options to the Ogwen Valley are generally available, connecting to larger towns in Snowdonia. It's advisable to check local bus schedules for the most current information.

Are there any circular mountaineering routes around Llyn Ogwen?

Yes, many of the mountaineering routes around Llyn Ogwen are designed as loops, allowing you to start and finish at the same point. Examples include the Pen Yr Ole Wen – Carnedd Llewelyn Summit loop from Tryfan and the Tryfan Summit – The Cantilever Stone loop from Tryfan. The Llyn Ogwen circular walk also offers great views.

What natural features or landmarks can I see along the mountaineering routes?

The Llyn Ogwen area is rich in natural beauty and landmarks. You'll encounter glacial lakes like Llyn Ogwen and Llyn Idwal, dramatic waterfalls such as the Ogwen Falls (Rhaeadr Ogwen), and iconic peaks like Tryfan, Glyder Fach, and Glyder Fawr. The Castell Fawr rock formation is another notable sight.

Are there any family-friendly options for exploring the Llyn Ogwen area?

While many mountaineering routes are challenging, the Llyn Ogwen area offers diverse experiences. For families, accessible lakeside paths around Llyn Ogwen and Llyn Idwal provide a less strenuous way to enjoy the stunning scenery. The Ogwen Visitor Centre is a good starting point for information on easier walks.

What do other mountaineers enjoy most about the routes in Llyn Ogwen?

The mountaineering routes in Llyn Ogwen are highly rated by the komoot community, with an average score of 4.8 stars. Reviewers often praise the dramatic landscapes, the challenging and rewarding ascents, and the panoramic views from the summits of peaks like Tryfan and the Glyderau.

What is the best time of year for mountaineering in Llyn Ogwen?

The best time for mountaineering in Llyn Ogwen is typically during the warmer, drier months from late spring to early autumn (May to October). During winter, conditions can become very challenging with snow, ice, and shorter daylight hours, requiring specialized equipment and experience.

Are dogs allowed on the mountaineering trails around Llyn Ogwen?

Dogs are generally welcome on trails in Snowdonia National Park, including around Llyn Ogwen. However, it's crucial to keep dogs under close control, especially in areas with livestock or ground-nesting birds. Always follow the Countryside Code and be mindful of other users and wildlife.

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