488
a stunning loch
Blaenau Ffestiniog, Gwynedd

Llyn Cwm Corsiog

water managed by Cambrian Angling Association

Route Directions
Duration: 00:59 Distance: 2.93 km Ascent: 238.5m Difficulty: 43 / 100
High alkalinity Shallow Low shoreline complexity Mid elevation Very small

Any method is permitted.
The lake is at around 1,720 feet above sea level and 1 and a half hour's walk from Tanygrisiau.

At 7 acres, Cwm Corsiog is an excellent early-season lake until the weed grows in mid-summer making some of it unfishable. It can still be fished successfully after then by changing to floating lines and dry flies, casting over the weed into clear patches.

The trout are numerous and very free rising, and they run up to 3/4lb.

  • Blaenau Ffestiniog, Gwynedd
  • Lake
  • Brown trout

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

Waters nearby

Waters within 5 miles of Llyn Cwm Corsiog

Llyn Cwm Foel
Blaenau Ffestiniog, Gwynedd
1

The dam was breached in the early 90’s for safety reasons, it has since been partly rebuilt to supply a water turbine, but not to its former level. Al ...

  • lake
  • Brown trout
Llyn Conglog
Blaenau Ffestiniog, Gwynedd
2

A short distance from the summit of Allt Fawr lies Llyn Conglog. At 2000 feet, this remote eight-acre lake is worth a visit for the views alone. Du ...

  • lake
  • Brown trout
Llyn yr Adar
Blaenau Ffestiniog, Gwynedd
3

Sitting below the northern slopes of a mountain called Cnicht, lies LLyn yr Adar, in the Snowdonia National Park. Porthmadog lies to the southwest and ...

  • lake
  • Brown trout
Llyn Cwmorthin
Blaenau Ffestiniog, Gwynedd
4

Fairly easily accessible on foot, ideal for those looking to wet a line for a couple of hours. Holds a good stock of wild fish. ...

  • lake
  • Brown trout
Llynnau’r Cwn
Blaenau Ffestiniog, Gwynedd
5

Llynnau’r Cwn, or “Lakes of the Hound”, lie to the north west of Blaenau Ffestiniog, in Snowdonia National Park. Comprising of three small lakes they ...

  • lake
  • Brown trout
Llyn Llagi
Blaenau Ffestiniog, Gwynedd
6

An 8 acre lake that's a good hike but well worth the effort. A good average size of hard fighting wild brown trout. Try your flies below the steep cl ...

  • lake
  • Brown trout
Llynnau Barlwyd
Blaenau Ffestiniog, Gwynedd
7

Two lakes, one ten acres, the other five. Both lakes are thirty-minute walk from the lay-by at the top of the Crimea Pass. ...

  • lake
  • Brown trout
Llyn Du bach
Blaenau Ffestiniog, Gwynedd
8

Llyn Dubach sits above the town of Blaenau Ffestiniog, beyond the slate tips of some of the oldest quarries in the region. Now the quarries have long ...

  • lake
  • Brown trout
Llyn Manod
Blaenau Ffestiniog, Gwynedd
9

This 16-acre lake lies halfway between the Manod Mawr and Manod Bach mountains, above the town to the East. Fishing is rather rough due to the rocky s ...

  • lake
  • Brown trout
Llynau Diwaunydd
Betws-y-Coed, Wales
10

Llynau Diwaunydd is a pair of very remote mountain lakes. It is understood this water holds wild brown trout and arctic char. The Arctic char may b ...

  • lake
  • Arctic charr and Brown trout