Llyn Du bach
Llyn Du bach

About this water

Lake
Brown trout
Blaenau Ffestiniog, Gwynedd, Wales

Llyn Dubach sits above the town of Blaenau Ffestiniog, beyond the slate tips of some the oldest quarries in the region. Though surrounded by the remains of heavy industry and not too far from civilisation, this seven-acre lake offers excellent sport fishing in dramatic surroundings. Now the quarries have long been silent Llyn Dubach has developed its own character - particularly during heavy rain when the water can thunder down the hillside into the lake!

Created for the purposes of working the nearby Graig Ddu mill, the lake betrays its origins with a large stone structure that divides into two distinct parts. The southern edge of the smaller water is partly obstructed by weed and lilies. Both features can make for interesting choices in targeting fish. The northern edge of the larger water backs onto a rising hill that can make casting more challenging and shelters the lake from a north-east wind. The water is otherwise unrestricted all the way around, though the awkward nature of the bank means wading is a preferred option.

Home to lots of free-rising eager trout, Llyn Dubach is an excellent place to experiment with different or little-used tactics. Try a pair of traditional flies drawn rapidly in the shallower water and if the wind changes, switch quickly to dries fished on the surface.

The best way to reach Llyn Dubach is on foot from the town of Blaenau Ffestiniog to the west. A choice of two footpaths easily seen on OS maps will take you to the smaller of the two lakes and both take approximately 30 minutes to walk. The paths are not well travelled and steep in places, so care should be taken.

Water map

Permission & Tickets

Permits can be purchased online and from the following locations:

Siop Antur Stiniog,
Units 1 And 2 High Street,
Blaenau Ffestiniog.

Brethyn Blaenau,
33 High St,Blaenau Ffestiniog.
01766 831536

Siop Dewi
14-15 High St, Penrhyndeudraeth
LL48 6BN
01766 770266

Swyddfa'r Post,
Eurospar,
Market Place.
Blaenau Ffestiniog.
01766 830115


Contributed by

Tom Grahame


After trying coarse fishing as a teenager and sea fishing on family holidays to North Wales, Tom discovered fly-fishing for wild brown trout through the persistence of a good friend. He can be found stumbling around the banks of Cumbrian waters or the remote lochs of Scotland. A tall man, he's the designated pack mule and is capable of carrying campfire wood over great distances.

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