4.5
(35)
3,081
runners
136
runs
Jogging routes around Llyn Cowlyd offer a diverse range of running experiences within the Snowdonia National Park. The region is characterized by its rugged mountainous terrain, deep valleys, and the expansive Llyn Cowlyd reservoir itself. Runners can expect trails that traverse open moorland, ascend challenging hills, and wind through areas with varied elevation changes. The landscape provides a natural setting for both demanding trail runs and more accessible paths.
Last updated: May 11, 2026
3
runners
11.4km
01:36
450m
450m
Hard run. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(1)
84
runners
11.5km
01:59
700m
700m
Hard run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.

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4.0
(1)
17
runners
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
4.5
(2)
66
runners
15.8km
02:02
360m
360m
Hard run. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
4.5
(2)
61
runners
13.8km
01:44
310m
310m
Hard run. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Moel Siabod is a terrific viewpoint as it is isolated from the other main peaks of Eryri. On the day I climbed it I was fortunate to experience an inversion, where the clouds form a layer below the summit.
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There are fantastic views of Snowdonia from the top of Moel Siabod, but the weather must be clear. From the top it is possible to see 13 of the 14 highest peaks in Wales on a clear day without turning your head.
12
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Moel Siabod is a lonely mountain in Snowdonia, with a trigonometric point of almost 900 metres, above Betws-y-Coed and Capel Curig. The routes up can be easily varied to suit different needs and abilities, and are always beautiful, with views of 13 of the 14 highest peaks in Wales from the summit on a clear day – without turning your head! Good parking and a café at the foot make Moel Siabod a great day out every time. (Ordnance Survey)
11
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perfect place to take rest and enjoy the lake view!
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This is a serene lake located in the Conwy Valley surrounded by forested hills and the rugged landscape of Snowdonia. There's a cafe and fishery further south along the lake which is a lovely place to stop and refuel.
2
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Go through the tunnel, mind your head, don't be scared. you'll come out in to a small quarry in the side of the rock with old collapsed out buildings. such a weird little find.
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The running routes in the Llyn Cowlyd area offer a wide range of difficulties. You'll find options from easy paths suitable for beginners to very challenging trails for experienced runners. Out of approximately 140 routes, about 7 are considered easy, 53 are moderate, and 80 are difficult, reflecting the rugged mountainous terrain of Snowdonia National Park.
Running trails around Llyn Cowlyd vary significantly in length and time. For example, the Moel Siabod from Capel Curig trail running loop is about 11.5 km (7.2 miles) and takes around 2 hours. A shorter, moderate option like the Crimpiau from Capel Curig trail running loop is 6.4 km (3.9 miles) and can be completed in under an hour. Longer routes, such as the Llyn Crafnant – Llyn Geirionydd loop from Capel Curig, stretch to nearly 16 km (9.8 miles).
Yes, many of the running routes around Llyn Cowlyd are circular, allowing you to start and finish in the same location. Popular examples include the Moel Siabod from Capel Curig trail running loop and the Crimpiau from Capel Curig trail running loop. These loops are great for exploring the diverse landscapes without needing to retrace your steps.
The terrain around Llyn Cowlyd is characteristic of Snowdonia National Park, featuring rugged mountainous fells, open moorland, and deep valleys. You'll encounter varied surfaces, from rocky paths and grassy tracks to forest sections. Expect significant elevation changes on many routes, offering both challenging ascents and rewarding descents.
The running trails in Llyn Cowlyd are highly rated by the komoot community, with an average score of 4.5 stars from over 30 reviews. Runners frequently praise the stunning panoramic views, the tranquility of the lakes, and the diverse natural beauty of the mountainous landscape. The variety of routes, catering to different fitness levels, is also a common highlight.
While many routes in Llyn Cowlyd are challenging, there are easier options available. Approximately 7 of the 140 routes are classified as easy. These typically feature less elevation gain and more forgiving surfaces, making them ideal for beginners or a more relaxed run. Look for routes closer to the valley floors or around the smaller lakes for gentler gradients.
Experienced trail runners will find plenty of challenging options. The Moel Siabod from Capel Curig trail running loop is a popular choice, known for its significant elevation gain and demanding terrain. Another challenging option is the Llyn Crafnant – Llyn Geirionydd loop from Trefriw, which covers a substantial distance with notable climbs.
Access to the Llyn Cowlyd area, particularly trailheads like Capel Curig, is possible via local bus services within Snowdonia National Park. These services connect to larger towns such as Betws-y-Coed and Bangor, which have train stations. It's advisable to check current timetables, especially for routes that might have limited services.
Yes, the villages surrounding Llyn Cowlyd, such as Capel Curig and Betws-y-Coed, offer a selection of pubs and cafes. These establishments are popular with outdoor enthusiasts and provide opportunities for refreshments and meals before or after your run. You'll find traditional Welsh pubs and cozy cafes serving hot drinks and snacks.
The best time to run in Llyn Cowlyd is generally from late spring to early autumn (May to October) when the weather is milder and daylight hours are longer. However, the region's beauty can be enjoyed year-round. Winter running offers dramatic landscapes but requires appropriate gear for potentially cold, wet, and icy conditions, especially at higher elevations.
Many trails in Snowdonia National Park, including those around Llyn Cowlyd, are dog-friendly. However, it's crucial to keep dogs under close control, especially in areas with livestock or ground-nesting birds. Always follow the Countryside Code, keep dogs on a lead where required, and clean up after them to preserve the natural environment.
While the primary attraction is the natural landscape, many routes offer views of significant features. The Llyn Cowlyd reservoir itself is a prominent landmark. Trails often provide panoramic vistas of the surrounding Snowdonia peaks, deep valleys, and other tranquil lakes like Llyn Crafnant and Llyn Geirionydd, which are featured in routes such as the Llyn Ogwen and Ogwen Obelisk – Llyn Crafnant loop from Trefriw.


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