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United Kingdom
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South Wales
Carmarthenshire

Llyn y Fan Fach

The best walks and hikes around Llyn y Fan Fach

4.5

(680)

5,599

hikers

91

hikes

Hiking around Llyn y Fan Fach offers access to a landscape shaped by glacial activity, featuring two prominent glacial lakes, Llyn y Fan Fach and Llyn y Fan Fawr. The terrain includes dramatic escarpments and mountain peaks such as Picws Du and Fan Brycheiniog, the highest point in the Black Mountain range. Remote moorland and river valleys, like the Afon Sawdde, characterize the area, providing varied hiking conditions. The region's geology showcases Old Red Sandstone formations and glacial moraine.

Best hiking trails around Llyn y Fan Fach

  • The most popular hiking route is Llyn y Fan Fach to Llyn y Fan Fawr loop, an 8.8 miles (14.2 km) trail that takes 4 hours 36 minutes to complete. This moderate route encompasses both glacial lakes and offers expansive views of the surrounding mountains.
  • Another top favourite among local hikers is Fan Foel, Picws Du & Llyn y Fan Fach loop from Blaenau, a moderate 6.2 miles (10.0 km) path. This trail includes ascents to prominent peaks and offers panoramic vistas of the Brecon Beacons.
  • Local hikers also love the Llyn y Fan Fach – Afon Sawdde loop from Fforest Fawr, a 2.7 miles (4.4 km) trail leading through a river valley towards the glacial lake, often completed in about 1 hour 28 minutes.
  • Hiking around Llyn y Fan Fach is defined by glacial lakes, dramatic escarpments, and remote moorland. The network offers options for various ability levels, from easy strolls to challenging full-day adventures.
  • The routes in Llyn y Fan Fach are highly rated by the komoot community with an average score of 4.6 stars from over 600 reviews. More than 5000 hikers have used komoot to explore Llyn y Fan Fach's varied terrain.

Last updated: July 9, 2026

4.9

(159)

1,240

hikers

#1.

Llyn y Fan Fach to Llyn y Fan Fawr loop

14.2km

04:36

630m

630m

Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

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Moderate

Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

Moderate
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Hard hike. Very good fitness required. Easily-accessible paths. Suitable for all skill levels.

Hard

Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.

Easy

Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

Moderate
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Tips from the Community

Kinga
February 20, 2025, View of Picws Du

https://hoofhike.com/ 👈

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Abee
February 7, 2025, Llyn y Fan Fach

I've seen that this is an amazing spot to watch the sunrise online!! it takes about 40-60 mins to get to the summit. wrap up warm!

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MaartenH
November 2, 2024, Old Fish Hatchery

Based on the feeding trough, the nursery appears to be active or recently used.

Translated by Google

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take your time

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Beautiful hike! Appropriate footwear is a must! Lady of the Lake story lays here one that will send chills upon you. Links with king Arthur, Merlin the wizard and his apprentice nimwae. Magical majestic creatures and stories to be found in the history of the area

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Frequently Asked Questions

How many hiking trails are available around Llyn y Fan Fach?

There are over 90 hiking trails in the Llyn y Fan Fach area, offering a wide range of options for different skill levels and preferences. The komoot community has explored these routes over 5,000 times, providing valuable insights and ratings.

Are there any easy hiking trails suitable for families or beginners?

Yes, Llyn y Fan Fach offers several easy trails. For instance, the Llyn y Fan Fach – Afon Sawdde loop from Fforest Fawr is a relatively easy 4.4 km path that follows the river towards the glacial lake, typically taking under 1.5 hours. This area is known for paths with manageable elevation gains, making it suitable for a relaxed outing.

What kind of challenging hikes can I find in the region?

For those seeking a challenge, the Llyn y Fan Fach area features routes with significant elevation gain and longer distances. An example is the View of Picws Du – Fan Foel summit loop from Fforest Fawr, a difficult 22.7 km trail that includes over 1000 meters of ascent, offering panoramic views from prominent peaks.

Are there any circular hiking routes around Llyn y Fan Fach?

Yes, many of the most rewarding hikes in the area are circular. The Fan Foel, Picws Du & Llyn y Fan Fach loop from Blaenau is a popular moderate circular route covering 10 km, taking you through dramatic landscapes and past the lake itself.

What natural features or landmarks can I expect to see while hiking?

The region is rich in dramatic natural features. You'll encounter the enchanting glacial lakes of Llyn y Fan Fach and its larger sibling, Llyn y Fan Fawr. The landscape is dominated by imposing escarpments and mountain peaks like Picws Du and Fan Brycheiniog. The Afon Sawdde river, flowing from Llyn y Fan Fach, also features small waterfalls along its course, adding to the scenic beauty.

Is Llyn y Fan Fach suitable for dog walking?

Many trails around Llyn y Fan Fach are dog-friendly, allowing you to enjoy the stunning scenery with your canine companion. However, as the area is remote moorland and often home to grazing sheep, it's crucial to keep dogs under close control, preferably on a lead, to protect livestock and wildlife.

What is the best time of year to go hiking in Llyn y Fan Fach?

The best time to hike in Llyn y Fan Fach is generally from late spring to early autumn (May to October) when the weather is milder and conditions are more stable. During these months, you'll experience clearer paths and better visibility for enjoying the panoramic views. Winter hiking is possible but requires appropriate gear and experience due to potentially harsh conditions, including snow and boggy terrain.

What do other hikers say about the trails in Llyn y Fan Fach?

The trails in Llyn y Fan Fach are highly rated by the komoot community, with an average score of 4.6 stars from over 600 reviews. Hikers frequently praise the area for its stunning natural beauty, the dramatic glacial lakes, and the sense of remote wilderness. Many appreciate the varied terrain that caters to different fitness levels.

Are there any facilities or amenities near the Llyn y Fan Fach hiking areas?

Llyn y Fan Fach is situated in a remote part of the Brecon Beacons, so amenities are limited directly at the trailhead. It's advisable to come prepared with all necessary supplies, including food, water, and appropriate gear. You may find facilities such as pubs or cafes in nearby villages, but these are not immediately adjacent to the main hiking access points.

Is there parking available for hikers at Llyn y Fan Fach?

Yes, there are designated parking areas available for hikers accessing Llyn y Fan Fach. These are typically located at the start of popular trailheads, such as near the Llyn y Fan Fach dam or in areas like Blaenau or Fforest Fawr. Due to the area's popularity, especially on weekends, it's recommended to arrive early to secure a spot.

Can I reach Llyn y Fan Fach by public transport?

Reaching Llyn y Fan Fach by public transport can be challenging due to its remote location within the Brecon Beacons National Park. While some bus services operate within the wider park, direct access to the Llyn y Fan Fach trailheads is very limited. It is generally recommended to travel by car to access the main starting points for hikes in this area.

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