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Running Trails
United Kingdom
Wales
North Wales
Gwynedd

Llyn Cwm Bychan

The best running trails around Llyn Cwm Bychan

4.9

(8)

1,028

runners

31

runs

Jogging routes around Llyn Cwm Bychan traverse a diverse landscape within Snowdonia National Park's Rhinogydd mountains. The region features the serene Llyn Cwm Bychan lake, rugged gritstone peaks, and peaceful oak woodlands. Terrain varies from accessible lakeside paths to challenging mountain trails with significant elevation changes, catering to different fitness levels.

Best jogging routes around Llyn Cwm Bychan

  • The most popular jogging route is Rhinog Fawr & Gloyw Lyn loop from Cwm Bychan — Eryri (Snowdonia) National Park, a…

Last updated: May 11, 2026

1

runners

#1.

Rhinog Fawr & Gloyw Lyn loop from Cwm Bychan — Eryri (Snowdonia) National Park

8.23km

01:17

570m

570m

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 accessible paths. Some sure footedness required.

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

Moderate

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

Moderate

6

runners

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

Moderate
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Popular around Llyn Cwm Bychan

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Tips from the Community

Henry
October 14, 2025, The Roman Steps

Steady, rocky climb through a majestic valley. A lot of the path follows the stream so can be wet and boggy. This is fairly challenging and better for more experienced walkers.

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Clive G
October 4, 2025, Rhinog Fach Summit

If you are walking from the west, this will be a blessed relief as the paths become clearer for a while.

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The Rhinogs are rightly recognised as being the roughest hills in Wales, so any ascent should bear that in mind. The easiest and clearest route is from the East, starting from the small car park at the end of the lane off the A470. This route is easy to follow and relatively easy to walk. The routes from the west include very difficult walking and few paths.

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Take some change for the honesty box (parking)

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Beautiful walk very quiet....don't be surprised if you don't see anyone else...

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51m
September 6, 2023, Llyn Gloyw

A long, narrow and cold lake in the Rhinog range of mountains. It would make a great swim on a hot day, perfect to cool down after an ascent of Rhinog Fawr.

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51m
September 6, 2023, Rhinog Fach Summit

Rhinog Fawr at 2,362 feet (720 m) is the third-highest mountain in the Rhinogydd range of southern Snowdonia. The rocky summit is a fun top with good views over the surrounding peaks and out over Cardigan Bay to the west.

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51m
September 6, 2023, Llyn Du (Rhinog Fawr)

Llyn Du is a wonderful mountain lake below Rhinog Fawr. It's always cold but this edge is easily accessible and perfect to cool your feet on a hot run.

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Frequently Asked Questions

How many running routes are available around Llyn Cwm Bychan?

There are over 30 dedicated running routes around Llyn Cwm Bychan, catering to various fitness levels. These include easy lakeside paths, moderate trails, and challenging mountain ascents within the rugged Rhinogydd mountains.

Are there any easy or beginner-friendly jogging routes in the Llyn Cwm Bychan area?

Yes, while many routes offer a challenge, the immediate area around Llyn Cwm Bychan features well-defined lakeside trails that are relatively flat and accessible, ideal for an easy run or for beginners. These paths often follow a good surfaced track alongside the lake.

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

The terrain is quite varied, ranging from easily accessible paths with minimal elevation gain around the lake to rugged mountain trails with significant ascents in the Rhinogydd range. You'll encounter oak woods, streams, and gritstone peaks. Be aware that some of the tougher sections can be very boggy and challenging, especially after rain.

Are there any challenging running trails for experienced runners near Llyn Cwm Bychan?

Absolutely. For experienced runners seeking a challenge, routes like the Rhinog Fawr & Gloyw Lyn loop from Cwm Bychan offer significant elevation gains and rugged terrain. Another popular difficult option is the Llyn Morwynion – Llyn Du loop from Cwm Bychan Campsite, which explores the area's lakes with a challenging ascent.

Are there any circular running routes available?

Yes, many of the routes around Llyn Cwm Bychan are designed as loops. For example, the popular Rhinog Fawr & Gloyw Lyn loop and the Fonlief Hir Standing Stone – Cefnfilltir Standing Stone loop from Llanfair are excellent circular options, allowing you to start and finish at the same point.

What notable landmarks or attractions can I see while running in Llyn Cwm Bychan?

Runners can enjoy stunning natural features like Llyn Cwm Bychan itself, the rugged Rhinogydd mountains, and peaceful oak woodlands. A prominent historical attraction is the Roman Steps, which are large rock slabs forming part of a medieval packhorse track, often incorporated into longer routes. You might also encounter ancient standing stones, such as those on the Fonlief Hir Standing Stone – Cefnfilltir Standing Stone loop.

Is Llyn Cwm Bychan a good place for family-friendly running or walks?

Yes, the area offers options suitable for families. The well-defined lakeside paths around Llyn Cwm Bychan provide a relatively flat and scenic environment for gentle jogs or walks with children. These routes offer beautiful views without significant elevation challenges.

What do other runners enjoy most about the trails in Llyn Cwm Bychan?

The running routes in Llyn Cwm Bychan are highly rated by the komoot community, with an average score of 4.9 stars. Reviewers often praise the serene lakes, rugged mountain ranges, and peaceful oak woodlands, as well as the tremendous views and the sense of solitude offered by the less crowded trails.

Are there options for parking near the running routes?

Yes, parking is generally available in the vicinity of Llyn Cwm Bychan, particularly near common starting points for trails, such as the Cwm Bychan Campsite. It's advisable to check specific route details for the most convenient parking locations.

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

Llyn Cwm Bychan offers beautiful scenery year-round. However, spring and autumn often provide the most pleasant running conditions with milder temperatures and vibrant landscapes. Summer can be warm, while winter may bring colder, wetter, and potentially boggy conditions, especially on higher mountain trails. Always check local weather forecasts before heading out.

Can I bring my dog on the running trails around Llyn Cwm Bychan?

Many trails in Snowdonia National Park are dog-friendly, but it's crucial to keep dogs under close control, especially in areas with livestock. Always follow the Countryside Code, keep dogs on a lead where required, and clean up after them. Specific route details should be checked for any restrictions.

Are there any less crowded running trails if I'm looking for solitude?

The Rhinogydd mountains, where Llyn Cwm Bychan is situated, are known for being generally less crowded than other parts of Snowdonia. This means you're likely to find a sense of solitude and peace on many of the trails, particularly on the more challenging mountain loops, allowing for an inspiring natural environment.

What are the typical durations for running routes in this area?

Running durations vary significantly based on the route's difficulty and length. Easy lakeside jogs might take less than an hour, while moderate trails like the Fonlief Hir Standing Stone – Cefnfilltir Standing Stone loop can take around 1 hour 10 minutes. More challenging mountain routes, such as the Rhinog Fawr & Gloyw Lyn loop, typically require over 1 hour 15 minutes to complete.

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