Llyn y Fan Fach, Brecon Beacons National Park

4.9
#4 of 6 in Nature in Brecon Beacons National Park
Llyn y Fan Fach is a lake of approximately 10 hectares on the northern margin of the Black Mountain in Carmarthenshire, South Wales and lying within the Brecon Beacons National Park. The lake lies at an altitude of approximately, immediately to the north of the ridge of the Carmarthen Fans. It is the smaller of two lakes within this mountain massif: the slightly larger Llyn y Fan Fawr is about to the east.GeologyThe lake is overlooked by several prominent mountain peaks, especially Picws Du and Waun Lefrith. Waun Lefrith is formed from the sandstones and mudstones of the Brownstones Formation of the Old Red Sandstone laid down during the Devonian period. Its southern slopes are formed from the hard-wearing sandstones of the overlying Plateau Beds Formation which are of upper/late Devonian age. It is those rocks which form vertical crags along the top edge of the scarp. The northern face of Waun Lefrith was home to a glacier during the ice ages which gouged out the cwm in which Llyn y Fan Fach now sits. This empties via the Afon Sawdde into the River Towy. The southern slopes drain via the Twrch Fechan, the Nant Menyn and Nant Lluestau into the Afon Twrch and so into the River Tawe. Large moraines occur to the east of the summit at the base of the scarp, and below the prominent peak of Picws Du as well as those damming the Lake.
Our Brecon Beacons National Park trip planner makes visiting Llyn y Fan Fach and other Brecon Beacons National Park attractions simple, and helps you make a travel plan personal to you.
Source
Create an itinerary including Llyn y Fan Fach
map
Llyn y Fan Fach Reviews
Rate this attraction
TripAdvisor Traveler Rating
TripAdvisor Traveler Rating 5.0
46 reviews
Google
4.9
TripAdvisor
  • Famous for its romantic tale this walk is so far the best I ever did... sitting at the bottom of black mountain of the beacon beacon national parks... this gorgeous clean Lake famous for its romantic ...  more »
  • Visiting family in South Wales and we decided to spend some time walking in the Brecon Beacons, chose to walk up and down Pen Y Fan. Would recommend this to others as the view from the top was absolut...  more »
  • From driving onto the car park the view was amazing! and the walk from beginning to end was breathtaking A brilliant walk and day.  more »
Google
  • Absolutely amazing place. Not a hiker just fancied a walk. Had brand new trainers on what got ruined, views are well worth the walk tho.
  • A truly, truly stunning location. A little off the usual tourist hotspots, so well worth a visit if you're looking for somewhere different. The steep sided mountain the runs down into the reservoir is really striking. An unforgettable location.
  • Amazing place to visit any time of the year. This part of Wales is perfect for hiking and climbing hills.
  • Breathtaking views from the top if u walk up the mountain itself. You're even able to see Usk reservoir/Trecastle in the distance. Otherwise u can enjoy the serenity and beauty of the lake and streams. Children may find it tiring but its well worth a visit. Car park is quite a distance from the lake itself so be prepared for a walk (all slightly uphill). Its a little hard to find first time lots of pretty lanes and not many signs but persevere you'll be glad its definitely one of the better places to go to appreciate Wales' beauty.
  • Go early morning..... We did it at the end of May and the birds sang their hearts out for us.... larks and pipits I think!!! Ceaselessly singing, as if they were so pleased we came to see them... You will be so pleased with the experience....

Plan your trip to Brecon Beacons National Park

  • Get a personalized plan

    A complete day-by-day itinerary
    based on your preferences
  • Customize it

    Refine your plan. We'll find the
    best routes and schedules
  • Book it

    Choose from the best hotels
    and activities. Up to 50% off
  • Manage it

    Everything in one place.
    Everyone on the same page.

Where to stay in Brecon Beacons National Park

Browse hotels, guesthouses, and unique homes and book your stay on the world's leading accommodation sites.
Live like a local, find unique places to stay
Millions of travel reviews on TripAdvisor

Plans in Brecon Beacons National Park by other users

13 days in United Kingdom BY A USER FROM UNITED KINGDOM June, kids, culture, outdoors, relaxing, beaches, historic sites, shopping, wildlife, popular PREFERENCES: June, kids, culture, outdoors, relaxing, beaches, historic sites, shopping, wildlife ATTRACTION STYLE: Popular PACE: Medium 3 days in Brecon Beacons National Park BY A USER FROM UNITED KINGDOM February, popular PREFERENCES: February ATTRACTION STYLE: Popular PACE: Medium 4 days in Monmouth & Brecon Beacons National Park BY A USER FROM UNITED KINGDOM May, popular PREFERENCES: May ATTRACTION STYLE: Popular PACE: Medium 39 days in Wales BY A USER FROM BERMUDA August, culture, outdoors, relaxing, historic sites, wildlife, popular & hidden gems PREFERENCES: August, culture, outdoors, relaxing, historic sites, wildlife ATTRACTION STYLE: Popular & hidden gems PACE: Medium 1 day in Brecon Beacons National Park BY A USER FROM UNITED KINGDOM December, hidden gems PREFERENCES: December ATTRACTION STYLE: Hidden gems PACE: Medium 32 days in United Kingdom BY A USER FROM UNITED STATES May, teens, culture, outdoors, relaxing, beaches, historic sites, hidden gems PREFERENCES: May, teens, culture, outdoors, relaxing, beaches, historic sites ATTRACTION STYLE: Hidden gems PACE: Medium 3 days in Brecon Beacons National Park BY A USER FROM UNITED KINGDOM January, romantic, popular PREFERENCES: January, romantic ATTRACTION STYLE: Popular PACE: Medium 17 days in United Kingdom BY A USER FROM UNITED KINGDOM March, outdoors, beaches, historic sites, popular & hidden gems PREFERENCES: March, outdoors, beaches, historic sites ATTRACTION STYLE: Popular & hidden gems PACE: Medium 7 days in Wales BY A USER FROM UNITED KINGDOM March, culture, outdoors, beaches, popular & hidden gems PREFERENCES: March, culture, outdoors, beaches ATTRACTION STYLE: Popular & hidden gems PACE: Medium 21 days in Abu Dhabi, United Kingdom & Dublin BY A USER FROM AUSTRALIA June, popular PREFERENCES: June ATTRACTION STYLE: Popular PACE: Medium 55 days in Western Europe BY A USER FROM UNITED STATES June, teens, culture, outdoors, relaxing, beaches, historic sites, museums, shopping, wildlife, popular & hidden gems PREFERENCES: June, teens, culture, outdoors, relaxing, beaches, historic sites, museums, shopping, wildlife ATTRACTION STYLE: Popular & hidden gems PACE: Medium 52 days in Western Europe BY A USER FROM UNITED STATES June, teens, culture, outdoors, relaxing, beaches, historic sites, museums, shopping, wildlife, popular & hidden gems PREFERENCES: June, teens, culture, outdoors, relaxing, beaches, historic sites, museums, shopping, wildlife ATTRACTION STYLE: Popular & hidden gems PACE: Medium
View more plans