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Running Trails
United Kingdom
Wales
North Wales
Gwynedd

Llyn Idwal

The best running trails around Llyn Idwal

4.7

(70)

8,341

runners

202

runs

Jogging around Llyn Idwal offers a diverse experience within a dramatic glacial landscape. The region is characterized by Cwm Idwal, a U-shaped valley cradling the clear waters of Llyn Idwal, surrounded by the craggy cliffs of the Glyderau Mountains. Geological features like the Devil's Kitchen and Idwal Slabs contribute to the varied terrain, providing options from lakeside paths to challenging mountain ascents.

Best jogging routes around Llyn Idwal

  • The most popular jogging route is Llyn Idwal loop from Ogwen Cottage…

Last updated: June 24, 2026

4.0

(5)

179

runners

#1.

Carnedd Dafydd & Carnedd Llewelyn loop from the Ogwen Valley

19.7km

02:50

930m

930m

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

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Hard

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

Hard
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40

runners

4.24km

00:29

110m

110m

Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Moderate

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

Hard

9

runners

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

Hard
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Popular around Llyn Idwal

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Tips from the Community

Clive G
January 27, 2026, Pen Yr Ole Wen

A steep and relentless pull up from Ogwen Cottage to the gateway of the Carneddau. It offers staggering views across the Ogwen Valley to the Glyderau.

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A very fine mountain that is the high point of the Carneddau range. These mountains are high, remote and so much quieter than the Glyderau or Snowdon. Fabulous walking country.

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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 27, 2025, Y Garn Summit

Y Garn is a fine hill, usually climbed from Ogwen Valley by it's West ridge, or as part of the walk along the Glyders range between Elidir Fawr and the Glyders themselves. There is however another way up, the East Ridge, which is a Grade 2 scramble and starts from Llyn Idwal.

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Clive G
October 16, 2025, Carnedd Dafydd

A high mountain with reasonable length walk-ins. Good scrambling route on it's north side that gives fine views of the 'Balck Ladders' cliff face.

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Clive G
October 12, 2025, Bwlch Tryfan

A meeting of the ways as well as the col between Tryfan and Glyder Fach

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Clive G
October 12, 2025, Bwlch Tryfan

The high pass between Tryfan and Glyder Fach is also a crossroads for a number of paths - down to the Ogwen valley, but also up to Tryfan and to Glyder Fach via the Bristly Ridge or the bypass route.

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Lovely views but tricky summit to find boulders everywhere you need to climb up to the summit if wet would be unsafe cantilever stone looks amazing only problem with glyders is very bad on the foot but really enjoyed it I did tryfan north face then down the south side up the loose scree that was some climb and half top of glyders then Down one hell of a loose scree up y garn then down devils kitchen I wouldn't advise going down that if you are not good on your feet it's hell I've done it both ways going up is so much easier going down devils kitchen is really bad

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Frequently Asked Questions

How many running routes are available around Llyn Idwal?

There are over 200 running routes available around Llyn Idwal, offering a wide range of options for different fitness levels and preferences. These include everything from easy lakeside loops to challenging mountain ascents.

What kind of terrain can I expect on the running trails around Llyn Idwal?

The terrain around Llyn Idwal is incredibly varied. You'll find well-trodden, stone-paved paths, especially near the lake, but also rocky, uneven, and potentially wet sections, particularly on trails ascending towards the peaks of the Glyderau Mountains. The landscape is characterized by dramatic glacial valleys and craggy cliffs.

Are there running routes suitable for beginners or more casual runners?

Yes, Llyn Idwal offers routes suitable for beginners and casual runners. The Llyn Idwal loop from Ogwen Cottage is a popular and relatively easy option, approximately 4.2 km (2.6 miles) long, providing stunning views without significant elevation gain. There are also 10 easy routes and 84 moderate routes available.

Are there challenging routes for experienced trail runners?

Absolutely. For experienced trail runners seeking a challenge, Llyn Idwal offers numerous difficult routes. For example, the Y Garn to Glyder Fach trail running loop is a difficult 11.5 km (7.2 miles) path involving significant elevation gain across challenging mountain terrain. Overall, there are 115 difficult routes in the area.

What natural features or landmarks can I see while running around Llyn Idwal?

While running, you can experience the dramatic glacial landscape of Cwm Idwal, the clear waters of Llyn Idwal itself, and the towering cliffs of the Glyderau Mountains. Notable geological features include the dark chasm of The Devil's Kitchen (Twll Du), the prominent Idwal Slabs popular with climbers, and the Darwin Idwal Boulders, which are large scattered rocks near the lake's shore. You'll also encounter beautiful waterfalls cascading down the mountainsides.

Are there any circular running routes around Llyn Idwal?

Yes, circular routes are a highlight of the area. The Llyn Idwal loop from Ogwen Cottage is a well-known circular path that takes you around the lake, offering continuous scenic views. For a more strenuous circular option, consider the Glyder Fawr & Glyder Fach loop from Ogwen Cottage.

What do other runners say about the trails around Llyn Idwal?

The running routes in Llyn Idwal are highly rated by the komoot community, with an average score of 4.7 stars from over 70 reviews. More than 8,000 runners have used komoot to explore the varied terrain, often praising the stunning views, the unique geological features, and the diverse range of challenges available.

Is Llyn Idwal suitable for family-friendly running or walks?

Yes, the area offers options suitable for families. The initial path from Ogwen Cottage to Llyn Idwal is stone-paved and has a modest elevation change, making it easily accessible. The Llyn Idwal loop itself is a popular choice for families, offering beautiful scenery on a relatively easy path.

Can I bring my dog on the running trails in Llyn Idwal?

While many trails in Snowdonia National Park are dog-friendly, it's always recommended to keep dogs on a lead, especially in areas with livestock or sensitive wildlife. Given the unique botanical importance of Cwm Idwal and the presence of rare Arctic-alpine plants, responsible dog ownership is crucial to protect the environment.

What kind of footwear is recommended for running in Llyn Idwal?

Due to the varied terrain, which can include rocky, uneven, and wet sections, especially on higher trails, sturdy trail running shoes with good grip are highly recommended. Even on the easier paths, appropriate footwear will enhance your comfort and safety.

Is there parking available near the trailheads for Llyn Idwal?

Yes, parking is available near the main access point at Ogwen Cottage. However, as Llyn Idwal is a very popular destination, especially during peak seasons, parking spaces can fill up quickly. Arriving early is advisable to secure a spot.

How can I get to Llyn Idwal by public transport?

Llyn Idwal is accessible by public transport, primarily via bus services that run along the A5 road through the Ogwen Valley. The nearest bus stop is typically at Ogwen Cottage, which is the main starting point for trails into Cwm Idwal. It's best to check local bus timetables for current routes and schedules.

What is the best time of year to go running in Llyn Idwal?

The best time to go running in Llyn Idwal is generally during the spring, summer, and early autumn months (May to October) when the weather is milder and daylight hours are longer. However, the region's cool, damp microclimate means conditions can change rapidly, so always be prepared for varying weather regardless of the season.

Most popular routes around Llyn Idwal

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