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United Kingdom
Wales
North Wales
Gwynedd
Llanllechid

Glyder Fawr & Glyder Fach loop from Ogwen Cottage

Hard

27

runners

Glyder Fawr & Glyder Fach loop from Ogwen Cottage

01:52

10.1km

740m

Running

Embark on the Glyder Fawr & Glyder Fach loop from Ogwen Cottage, a difficult jogging route that plunges you into a landscape often likened to a stony wasteland or moon-scape. This challenging 6.3-mile (10.1 km) journey demands a significant effort, with 2414 feet (736 metres) of elevation gain over an estimated 1 hour and 52 minutes. You will navigate steep, rocky ascents and descents, loose scree, and bouldery paths, passing the picturesque Cwm Idwal. From the summits, expect expansive 360-degree panoramas, including a glimpse of the iconic Cantilever Stone on Glyder Fach.

This difficult route is not recommended for beginners; ensure you have proper hiking footwear to navigate the loose and uneven ground safely. Be prepared for rapidly changing weather conditions, as fog can make navigation tricky and rain can make surfaces very slippery. Starting from Ogwen Cottage, plan your visit to allow ample time for the challenging terrain and potential weather shifts. Always check forecasts before you head out.

This loop offers a truly unique experience within Eryri (Snowdonia) National Park, known for its rugged and dramatic scenery. The otherworldly feel of the Glyderau mountains, with their distinctive rock formations and vast views, sets this trail apart. It's a prime example of the challenging and rewarding high-mountain jogging available in this region, offering a memorable adventure for those seeking a demanding physical test.

Last updated: April 23, 2026

Tips

Your route passes through a protected area

Please check local regulations for:

Parc Cenedlaethol Eryri

Waypoints

A

Start point

Parking

Get Directions

1

20 m

Ogwen Visitor Centre and Snack Bar

Highlight • Parking

The visitor centre is located on the A5, approximately 5 miles south of Bethesda and approximately 4 miles west of Capel Curig, on the western side of Llyn Ogwen.
There are a number of facilities including toilets, disabled toilets, an information room, public wifi and a small kiosk selling hot and cold snacks.
From the visitor centre you can start a range of walks and climbs in the area. The most popular is the walk to Wales' first ever national nature reserve, the beautiful Cwm Idwal, a glacial lake with a mountainous backdrop.
(Cwm Idwal National Nature Reserve)

Translated by Google •

Tip by

2

990 m

Cwm Idwal

Highlight • Lake

A beautiful lake with stunning views to Tryfan and Pen Yr Ole Wen. There is a circular walk from the visitors centre which takes you around the lake or you can use this as a starting point for the mountains above.

Tip by

3

4.09 km

Glyder Fawr summit

Highlight • Summit

The summit of Glyder Fawr is magnificent. On a clear day you will see incredible views of Snowdon, Crib Goch and Garnedd Ugain. At 3,284 feet (1,001 m), it is the highest peak in the Glyderau range.

Tip by

B

10.1 km

End point

Parking

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Way Types & Surfaces

Way Types

4.62 km

2.53 km

2.26 km

674 m

< 100 m

Surfaces

3.82 km

3.74 km

1.56 km

807 m

< 100 m

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Elevation

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

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Weather

Powered by Foreca

Thursday 7 May

13°C

3°C

32 %

Additional weather tips

Max wind speed: 20.0 km/h

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This route was planned by komoot.

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Frequently Asked Questions

How long does it typically take to complete the Glyder Fawr & Glyder Fach loop?

While the tour data suggests a jogging duration of around 1 hour 52 minutes, this is a challenging route. For most experienced hikers, it's a strenuous mountain day that can take anywhere from 4 to 7 hours, depending on fitness levels, weather conditions, and how much time you spend enjoying the views and unique rock formations.

Where does the trail start and where can I park?

The trail conveniently starts from Ogwen Cottage. Parking is available at the Ogwen Visitor Centre and Snack Bar. Be aware that this is a popular spot, so parking can fill up quickly, especially on weekends and during peak season. Arriving early is highly recommended.

Is the Glyder Fawr & Glyder Fach loop suitable for beginners?

No, this loop is considered difficult and is not recommended for beginners. It requires very good fitness, sure-footedness, sturdy shoes, and potentially alpine experience. The terrain includes steep, rocky ascents and descents, loose scree, and bouldery paths, with sections that may involve mild scrambling.

What is the terrain like on this route?

The terrain is highly varied and often difficult. Expect steep, rocky ascents and descents, loose scree, and bouldery paths. Sections like the ascent via Devil's Kitchen involve steep, stepped paths and may require mild scrambling. The path from Llyn y Cwn up to Glyder Fawr is particularly known for its loose scree, and the section between Glyder Fawr and Glyder Fach is a 'sea of rocks' requiring careful navigation over boulders. Wet conditions can make surfaces very slippery.

What kind of views and landmarks can I expect to see along the way?

The loop offers spectacular and 'otherworldly' scenery. Highlights include the picturesque Cwm Idwal and Llyn Idwal, views of the Devil's Kitchen, and stunning 360-degree panoramas from the Glyder Fawr summit. You'll also encounter unique rock formations like Castell y Gwynt ('Castle of the Wind') and the iconic Cantilever Stone on Glyder Fach, a popular photo spot.

When is the best time of year to visit this trail?

The best time to visit is typically during the late spring, summer, and early autumn months (May to October) when the weather is generally more stable and daylight hours are longer. However, even in summer, mountain weather can change rapidly. Winter conditions can make the route significantly more challenging, requiring specialist equipment and experience.

Is the trail dog-friendly?

Yes, dogs are generally allowed on this trail. However, due to the challenging terrain, including steep rocky sections and potential scrambling, it may not be suitable for all dogs. Always keep dogs on a lead, especially near livestock and to protect wildlife, and ensure they are capable of handling the strenuous conditions.

Are there any permits or entrance fees required for this route or Eryri National Park?

No, there are no specific permits or entrance fees required to hike this route or to enter Eryri (Snowdonia) National Park. However, parking at popular trailheads like Ogwen Cottage usually incurs a fee. Please respect the 'leave no trace' principles and follow the Countryside Code when visiting the park.

What essential gear should I bring for this challenging route?

Given the difficult nature of the trail, essential gear includes sturdy hiking boots with good ankle support, waterproof and windproof layers, a map and compass (and the skills to use them), sufficient water and snacks, a first-aid kit, and a headlamp (even for day hikes). Trekking poles can also be very helpful on the steep and rocky sections.

Does this route connect with other well-known paths?

Yes, this route intersects with several other paths. A significant portion of the loop follows sections of the Cambrian Way, and it also crosses parts of the Welsh Three Thousands and the Cwm Idwal Walk. You may also encounter short sections of the Miners' Track and Llwybr y Carw.

What makes this trail unique compared to other routes in Eryri National Park?

This loop offers a truly unique experience with its 'otherworldly' landscape, distinct from more frequented peaks like Snowdon. It combines rugged terrain with some of the most spectacular mountain views in the UK, featuring iconic geological formations such as the Cantilever Stone and Castell y Gwynt. It's an excellent choice for those seeking a strenuous mountain day with breathtaking geological features and expansive vistas.

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