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Picws Du

Picws Du

Hiking Highlight

Recommended by 39 out of 39 hikers

This Highlight is in a protected area

Please check local regulations for: Brecon Beacons National Park

  • Take Me There

Picws Du is a shapely emerald wedge, rising high on the northern end of the spectacular Black Mountain in the Brecon Beacons National Park. Its steep, terraced sandstone flanks sweep upwards to a lofty summit perch, overlooking the beautiful pool of Llyn y Fan Fach.

The Black Mountain is a magnificent upland escarpment that steadily gains height from the south and reaches its apex on Fan Brycheiniog at 2,633 feet (802 m). The scarp then curves around to the west and rises to Picws Du at 2,457 feet (749 m). After this, it falls and embraces a classic glacial cwm containing Llyn y Fan Fach. The range rivals the Central Beacons as the national park’s most stunning mountain environment.

A sensational emerald wedge of glaciated sandstone on the Black Mountain

There are various ways to Picws Du, with the quickest approach being from the Llyn y Fan Fach car park to the north. There is the option of a nearby campsite, or scattered accommodation in the surrounding countryside. Approaches from the east begin from the minor road alongside the tumbling River Tawe, often via Llyn y Fan Fawr and Fan Brycheiniog. None of the routes to Picws Du are particularly technical, making them a good adventure for the whole family.

Picws Du’s summit is home to a Bronze Age round barrow and boasts extensive views towards the distant Cambrian Mountains on a clear day. Beyond the Fforest Fawr region to the east, rise the forms of the Central Beacons, with Corn Du and Pen y Fan particularly distinctive.


  • Dan Hobson

    Picws Du, or Bannau Sir Gaer, is the highest point of the dramatic escarpment high above Llyn y Fan Fach. Due to the remote and untouched landscape, you may have the opportunity to see lots of birds, including red kite, common buzzard, kestrel, carrion crow, common raven and skylark.

    • October 30, 2018

  • The view from here is still one of my favorite. The shape of the mountain, the rocks and the green grass is amazing to observe.

    • July 18, 2020

  • The views from the escarpment overlooking Llyn Y Fan Fawr and Fach are simply stunning. For route details click here: komoot.com/tour/278490898

    • October 31, 2020

  • High elevation with good views on a clear day , very windy and wet on bad days

    • October 25, 2021

  • Picws Du is the second highest peak in the Black Mountain range in the Brecon Beacons. From here you get amazing views across the lake and the valley. Great ridge walk, would definitely recommend incorporating Llyn y Fan Fach and Llyn y Fan Fawr into your route (2 lakes).

    • May 17, 2021

  • Amazing tips overlooking the lake below. Tons of birds along the ride too.

    • July 29, 2022

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Best Hikes to Picws Du


Our Tour recommendations are based on thousands of activities completed by other people on komoot.

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  • Intermediate
    8.83 mi
    1.9 mph
    2,050 ft
    2,050 ft
  • Intermediate
    7.37 mi
    2.0 mph
    1,500 ft
    1,500 ft
  • Expert
    14.0 mi
    1.9 mph
    3,350 ft
    3,325 ft
  • Expert
    14.5 mi
    2.0 mph
    2,825 ft
    2,825 ft
  • Intermediate
    8.42 mi
    1.9 mph
    2,250 ft
    2,225 ft
  • Expert
    12.7 mi
    2.0 mph
    2,600 ft
    2,600 ft
  • Expert
    12.8 mi
    2.0 mph
    2,700 ft
    2,700 ft
  • Plan Your Own Tour
Location: Carmarthenshire, South Wales, Wales, United Kingdom


  • Elevation2,575 ft

Good to know

  • Family Friendly
  • Wheelchair access
  • Dog Friendly

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