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United Kingdom
Wales
North Wales
Gwynedd

Llyn Arenig-Fawr

The best running trails around Llyn Arenig-Fawr

3.0

(1)

348

runners

17

runs

Jogging around Llyn Arenig-Fawr offers a challenging experience within Snowdonia National Park, characterized by rugged mountain terrain and a secluded reservoir. The area features the imposing Arenig Fawr mountain, with its steep cliffs and heather-covered slopes. Trails consist of a mix of tracks, stony ground, and potentially boggy sections, providing varied conditions for runners. This landscape offers both demanding uphill climbs and flatter sections closer to the llyn.

Best jogging routes around Llyn Arenig-Fawr

  • The most popular jogging route is…

Last updated: July 8, 2026

8

runners

#1.

Llyn Arenig Fawr – Arenig Fawr Bothy loop from Capel Celyn

9.93km

01:30

530m

530m

Hard run. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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Hard

Hard run. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Hard
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Hard run. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Hard

Hard run. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Hard

Hard run. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Hard
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Popular around Llyn Arenig-Fawr

Road Cycling Routes around Llyn Arenig-Fawr

Cycling around Llyn Arenig-Fawr

Hiking around Llyn Arenig-Fawr

MTB Trails around Llyn Arenig-Fawr

Tips from the Community

Clive G
December 1, 2025, Arenig Fawr Summit & Flying Fortress Memorial

The memorial is right next to the summit cairn, and is suitably low key for such a location and what it commemorates.

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As the Arenig Fawr is an isolated peak the views in all directions are very good - including to the nearby Rhinogs.

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The secondary top of Arenig Fawr, but with equally good views.

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Clive G
October 2, 2025, Llyn Arenig Fawr

A lovely little lake (Llyn) in the shadow of Arenig Fawr, a great place for reflections when the weather is bright and calm.

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Clive G
September 30, 2025, Llyn Arenig Fawr

Artificially enlarged, this beautiful lake provides perfect reflections of the mountain above. Wonderfully peaceful place you will often have entirely to yourself.

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A fine summit atop an isolated peak so there are wide views in all direction. Also a very fitting memorial.

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Clive G
September 29, 2025, Moel Llyfnant Summit

Arenig Fawr's smaller neighbour, but great views back to Arenig Fawr itself.

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This old cottage is in the process of being rebuilt, but the farmstead next to it is still in ruins.

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Frequently Asked Questions

How many running routes are available around Llyn Arenig-Fawr?

There are 18 running routes available around Llyn Arenig-Fawr. These include 9 moderate and 9 difficult trails, offering a range of challenges for runners.

What kind of terrain can I expect on the jogging routes near Llyn Arenig-Fawr?

The terrain around Llyn Arenig-Fawr is rugged and varied, characterized by heather-covered slopes, stony ground, and tracks. You can expect challenging uphill climbs, especially towards the summit of Arenig Fawr, and potentially boggy sections, particularly in wet weather. Some upland areas above 750m can be exposed.

Are there any easy or beginner-friendly running routes in the Llyn Arenig-Fawr area?

The routes around Llyn Arenig-Fawr are generally considered challenging. There are no easy routes listed; all 18 routes are either moderate or difficult. The track leading to the reservoir offers a relatively clear beginning, but the overall environment is better suited for those seeking a more rigorous experience.

What are some of the most challenging running routes for experienced trail runners?

For experienced trail runners seeking a challenge, routes like the Arenig Fawr South Ridge Top – Moel Llyfnant loop from North Wales, an 11.3-mile difficult trail, offer significant elevation gain and varied mountain terrain. Another demanding option is the Arenig Fawr South Top – Llyn Arenig Fawr loop from North Wales, which is 9.3 miles and combines the mountain's challenging terrain with views of the secluded llyn.

What scenic spots or landmarks can I see while running in this region?

While running around Llyn Arenig-Fawr, you'll encounter dramatic landscapes dominated by the imposing Arenig Fawr mountain and the secluded reservoir itself. From the summit of Arenig Fawr, you can enjoy spectacular 360-degree panoramic views of most mountain summits in Snowdonia on clear days. There's also a memorial at the summit to an American aircrew, adding a poignant historical element.

Is Llyn Arenig-Fawr a good place for a secluded or quiet run?

Yes, Llyn Arenig-Fawr is often described as less visited compared to other peaks in Snowdonia, offering a strong sense of solitude and peace. This quiet atmosphere can enhance the meditative aspect of a long run, making it ideal for those seeking a secluded outdoor experience.

Are there circular running routes available around Llyn Arenig-Fawr?

Yes, there are several circular running routes. For example, the Arenig Fawr loop from Capel Celyn is a difficult 6.2-mile circular trail that ascends the rugged slopes of Arenig Fawr. Another option is the Running loop from North Wales, a difficult 7.4-mile route.

What is the best time of year to go running around Llyn Arenig-Fawr?

The best time of year for running around Llyn Arenig-Fawr generally depends on weather conditions. While the panoramic views are stunning on clear days, the area can be boggy, especially in wet weather. Upland areas are exposed, so checking local weather forecasts is crucial, particularly outside of warmer, drier months.

Where can I park when visiting the running trails near Llyn Arenig-Fawr?

While specific parking locations are not detailed in the route descriptions, access to the Llyn Arenig-Fawr area typically involves reaching Capel Celyn or other starting points in North Wales. It is advisable to research designated parking areas or roadside parking options near your chosen trailhead before your visit, as facilities can be limited in remote mountain regions.

What do other runners say about their experience in Llyn Arenig-Fawr?

The running routes in Llyn Arenig-Fawr are highly rated by the komoot community, with an average score of 3.0 stars. Over 200 runners have used komoot to explore the varied and challenging terrain, often praising the rewarding views and the sense of accomplishment from tackling the rugged mountain environment.

Can I bring my dog on the running trails around Llyn Arenig-Fawr?

While many trails in Snowdonia National Park are dog-friendly, it's important to be mindful of livestock, especially sheep, which are common in the area. Always keep dogs under close control, preferably on a lead, to protect wildlife and livestock. Some sections may also be challenging for dogs due to rocky or boggy terrain.

Are there family-friendly jogging options near Llyn Arenig-Fawr?

The routes directly around Llyn Arenig-Fawr are generally considered moderate to difficult, with rugged mountain terrain. For families seeking less strenuous options, the nearby Bala Lake – Llyn Tegid loop from Llangywer offers a moderate 8.6-mile route with minimal elevation gain, providing a more accessible experience.

Most popular routes around Llyn Arenig-Fawr

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