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United Kingdom
Wales
North Wales
Gwynedd
Beddgelert

Aberglaslyn, Llyn Dinas and Cwm Bychan Walk

Hard

5.0

(2)

19

runners

Aberglaslyn, Llyn Dinas and Cwm Bychan Walk

02:07

17.7km

570m

Running

Embark on a challenging jogging route through the heart of Snowdonia National Park with the Aberglaslyn, Llyn Dinas and Cwm Bychan Walk. This difficult 11.0 miles (17.7 km) journey takes you through the dramatic Aberglaslyn gorge, where the Glaslyn river carves its way alongside a narrow fisherman's path. You will gain 1877 feet (572 metres) of elevation over an estimated 2 hours and 7 minutes, passing the serene glacial waters of Llyn Dinas, perfect for a refreshing dip on a warm day. Expect to traverse ancient woodlands and enjoy expansive mountain views as you push your limits on this demanding trail.

Planning your visit requires careful consideration; this route demands good navigation skills and significant care, particularly along the gorge. While listed for jogging, its challenging terrain is often more suited for experienced country walkers with a high level of fitness. Be aware that during colder months, the path can become icy, and high river levels might make certain sections impassable. You can typically find parking in the Beddgelert area, which serves as a convenient starting point for your adventure.

Beyond the natural beauty, this trail offers glimpses into the area's rich industrial past, with remnants of old copper mine workings scattered along the way. The diverse scenery, from the powerful river in the gorge to the tranquil lake and mountain vistas, makes this route a standout experience in Snowdonia. It's a journey that combines physical exertion with historical intrigue and stunning natural landscapes, providing a memorable outing for those seeking a true challenge.

Last updated: April 23, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Parc Cenedlaethol Eryri

Waypoints

A

Start point

Parking

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1

518 m

Gelert's Grave (Beddgelert)

Highlight • Monument

In the 13th century Llywelyn, prince of North Wales, had a faithful hound named Gelert. One day, the hound was left to guard the prince's baby. When Llywelyn returned, his child was missing, but his hound was spattered with blood.

In his rage, the prince killed his dog, but then he heard a noise. He found his baby crying beside the body of a wolf. Gelert had killed the wolf to protect his master's baby and so the prince's heart was broken. He buried his dog here and the small village near to the grave is nowadays called Beddgelert, Welsh for Gelert's Grave.

Tip by

2

2.46 km

Pont Aberglaslyn

Highlight • Viewpoint

The bridge was probably built in the 17th century and then radically rebuilt and widened in 1795-1796. As with many older bridges, folk tales claimed that the bridge was built by the devil or by the Romans (which an investigation by the National Trust described as "very doubtful"). During the reconstruction, a stone was found with the inscription "W M 1656" scratched on it, suggesting that the bridge is at least that old.
Pont Aberglaslyn is located near the downstream end of the Aberglaslyn Pass. Although the location is rocky and the river flows through rapids upstream, it is not far above sea level.
(Wikipedia)

Showing Translation

Tip by

3

6.59 km

Llyn Dinas

Highlight • Lake

Llyn Dinas is a picturesque 24-hectare glacial lake in Eryri (Snowdonia) National Park in North Wales, near Beddgelert in the Nant Gwynant valley. It is a popular spot for scenic walks, wild trout fishing, paddleboarding, and swimming. The lake is relatively shallow (maximum 10 metres) and lies on the lower slopes near the Watkin Path to the summit of Snowdon.

Showing Translation

Tip by

B

17.7 km

End point

Parking

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Way Types & Surfaces

Way Types

6.88 km

6.61 km

2.15 km

1.43 km

592 m

< 100 m

Surfaces

11.1 km

2.48 km

1.70 km

1.29 km

1.06 km

< 100 m

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Elevation

Elevation

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Highest point (290 m)

Lowest point (30 m)

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Weather

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Wednesday 8 July

23°C

11°C

-- %

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Frequently Asked Questions

Is the Aberglaslyn, Llyn Dinas and Cwm Bychan Walk suitable for jogging?

While komoot categorizes this route as 'jogging', the trail is generally considered challenging and not ideal for continuous jogging due to its varied and often demanding terrain. It is better suited for experienced country walkers with a good level of fitness, involving steep sections, rough country, and potentially some scrambling.

What is the terrain like on this walk?

The trail features diverse and often rugged terrain. You can expect steep sections, particularly along the Aberglaslyn gorge where the 'fisherman's path' is narrow and requires care. Other parts include rocky and boggy areas, especially during ascents. There are also sections of rough country, steep hills, and crossings of the Welsh Highland Railway tracks. Some areas along the river have boardwalk sections.

What can I see along the route?

The walk offers spectacular scenery and historical features. Highlights include the dramatic Pont Aberglaslyn and gorge, the serene waters of Llyn Dinas, and the charming village of Beddgelert, home to Gelert's Grave. You'll also see remnants of the area's industrial past, such as old copper mine workings.

Where can I park for the Aberglaslyn, Llyn Dinas and Cwm Bychan Walk?

The most common starting point for this walk is the picturesque village of Beddgelert. Parking is available in and around Beddgelert, though it can get busy, especially during peak season. Arriving early is advisable.

Is this trail dog-friendly?

Yes, the trail is generally dog-friendly. However, given the varied terrain which includes narrow paths, steep sections, and potentially livestock, it's essential to keep dogs under close control, preferably on a leash, throughout the walk. Be prepared for stiles and rocky sections that might require assisting your dog.

What is the best time of year to visit?

Spring through autumn generally offers the best conditions for this walk. During colder months, the path can become icy, and high river levels can render some sections impassable, particularly along the Aberglaslyn gorge. Always check local weather and trail conditions before you go.

Are there any permits or entrance fees required for this walk?

No specific permits or entrance fees are required to access the Aberglaslyn, Llyn Dinas and Cwm Bychan Walk itself, as it is within Snowdonia National Park. However, standard parking fees may apply in designated car parks.

Does the trail intersect other well-known paths?

Yes, the route shares sections with several other paths. Notably, it covers portions of the Cambrian Way, the Snowdonia Slate Trail, and the Craflwyn, Hafod y Llan and Llyn Dinas walk. You may also encounter parts of the Watkin Path and the Lôn Gwyrfai.

Can I go wild swimming in Llyn Dinas?

Yes, Llyn Dinas is a beautiful glacial lake and a popular spot for wild swimming or dipping during warmer weather. Always exercise caution, be aware of water temperatures, and respect the natural environment.

Are there amenities like cafes or pubs nearby?

Yes, the walk starts and ends near the village of Beddgelert, which offers several amenities. You'll find cafes, pubs, and accommodation options there, perfect for a refreshment or meal before or after your walk.

How long does the Aberglaslyn, Llyn Dinas and Cwm Bychan Walk typically take?

For experienced walkers, this challenging route typically takes around 2 hours and 7 minutes to complete. However, this duration can vary significantly based on fitness levels, weather conditions, and time spent enjoying the numerous viewpoints and historical sites along the way.

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