logo Walking Britain

Snowdonia Walk
Garnedd Goch via Cwm Silyn (Two Lakes Walk)

Nat Park - Snowdonia - Moel Hebog Nantlle Ridge

County/Area - Gwynedd

Author - Alan Birks

Length - 6.0 miles / 9.8 km    Ascent - 1800 feet / 545 metres

Time - 4 hours 50 minutes    Grade - moderate

Start - OS grid reference SH495510
Lat 53.035044 // Long -4.245935
Postcode LL54 6RT (approx. location only)
what3words start nuzzled.prouder.binder

Maps Ordnance Survey Logo Anquet Maps Logo

Ordnance Survey Explorer OL17Sheet Map1:25kBUY
Anquet OS Explorer OL17Digital Map1:25kBUY
Ordnance Survey Landranger 115Sheet Map1:50kBUY
Anquet OS Landranger 115Digital Map1:50kBUY

It is recommended you take a map. The preferred scale is 1:25k.

Walk Route Description

Photo from the walk - Garnedd Goch via Cwm Silyn (Two Lakes Walk) Photo from the walk - Garnedd Goch via Cwm Silyn (Two Lakes Walk) Photo from the walk - Garnedd Goch via Cwm Silyn (Two Lakes Walk) Photo from the walk - Garnedd Goch via Cwm Silyn (Two Lakes Walk) Photo from the walk - Garnedd Goch via Cwm Silyn (Two Lakes Walk) Photo from the walk - Garnedd Goch via Cwm Silyn (Two Lakes Walk)
Click thumbnails for larger images.

This circular Snowdonia walk is an ascent of Garnedd Goch (700m) via Cwm Silyn, with views of two lakes (Llynnau Cwm Silyn and Cwm Dulyn) as well as towards the Snowdon range, the Nantlle Ridge and the coasts by Caernarfon and Porthmadog. Either of the upward and downward routes can be used as a way off the Nantlle Ridge at the Llanllyfni/Nebo end.

Garnedd Goch via Cwm Silyn (Two Lakes Walk) Garnedd Goch via Cwm Silyn (Two Lakes Walk) Garnedd Goch via Cwm Silyn (Two Lakes Walk) Garnedd Goch via Cwm Silyn (Two Lakes Walk) Garnedd Goch via Cwm Silyn (Two Lakes Walk) Garnedd Goch via Cwm Silyn (Two Lakes Walk) Garnedd Goch via Cwm Silyn (Two Lakes Walk) Garnedd Goch via Cwm Silyn (Two Lakes Walk) Garnedd Goch via Cwm Silyn (Two Lakes Walk) 
Click thumbnails for larger images.

The walk duration is approximately 4 hours excluding Mynydd Graig Goch with route finding straightforward in clear weather. To reach the start from Llanllyfni take Lon Ddwr towards Tan Yr Allt and look for a right turn on to Lon Tyddyn Agnes. Follow this narrow lane to the top of the hill where there is gate on to the mountainside and rough parking used by walkers and climbers. (There is also parking at the Nebo end of the walk.)

From the gate (grid ref. SH495510) follow the broad path towards the lakes below Cwm Silyn. Before the path descends to the lake cross the wall on the right by the stile and turn right towards a fence. Follow this fence up the hillside. Follow the path up the hill towards the cliff edge. The path then follows the curve of the crags at a safe distance. If you find yourself very close to the edge (or very far away) you're probably on a sheep track! The path is easy to follow in good weather, less so in mist, but it always follows the line of the crags. At the top you will come to a wall and a stile leading on to the cairn at the top of Craig Cwm Silyn and beyond that the Nantlle Ridge itself.

From Craig Cwm Silyn there are excellent views towards Snowdon and the Nantlle Ridge in one direction, and Garnedd Goch and Mynydd Graig Goch (Wales' smallest mountain) in the other.

Instead of crossing the stile to climb to the cairn you can turn immediately right and follow the wall towards Garnedd Goch. As you approach the top it's best to abandon the wall and go across the rocks straight to the summit. From there, continue across another stile to begin the steep descent, with Llyn Cwm Dulyn ahead of you. At a marker stone you join another path which goes left to Bwlch Cwmdulyn and right in the direction of Nebo. (If you decide to "bag" Mynydd Graig Goch in passing, it's best to return to this point to descend as there are no obvious paths off the mountain otherwise.)

Follow a series of marker stones across the sometimes wet hillside to reach a long wall. Follow it down to the bottom corner, then set off towards a ruined cottage diagonally on your left. You will soon join a broader track leading left towards another stile.

After crossing the stile, follow the path between two walls to reach the Nebo road. A little way along on the right is a gate on to a bridleway (at Pen y Ffridd cottage) which will bring you back to Lon Tyddyn Agnes. Turn right on the lane to return to the parking area.



Other walks nearby

Walk 1131 Mynydd Mawr from Fron - easy/mod - 4.0 miles/6.5 km

Walk 3060 Moel Lefn & Moel yr Ogof from Cwm Pennant - moderate - 7.0 miles/11.4 km

Walk 2590 Nantlle Ridge Walk from Rhyd Ddu (Route A) - moderate - 6.0 miles/9.8 km

Walk 2797 Yr Aran and Snowdon from Rhyd-Ddu - mod/hard - 8.5 miles/13.8 km

Walk 3509 Nantlle Ridge from Rhyd Ddu (Route B) - mod/hard - 8.3 miles/13.4 km

Walk 3198 Snowdon via the South Ridge & Rhyd-ddu Path - mod/hard - 7.5 miles/12.2 km

Walk 1951 Mynydd Mawr from Rhyd-Ddu - moderate - 6.0 miles/9.8 km

Walk 2729 Snowdon by Rhyd-Ddu and Snowdon Ranger Paths - mod/hard - 7.5 miles/12.2 km

Walk 3613 Moel Cynghorion from Llyn Cwellyn - moderate - 5.0 miles/8.1 km

Walk 3373 Foryd Bay from Dinas Dinlle - easy - 5.6 miles/9.1 km

Recommended Books & eBooks

Mountain Walking in Snowdonia

Mountain Walking in SnowdoniaGuidebook to 40 of Snowdonia's best day walks, with routes up Snowdon and Tryfan, including the Snowdon Horseshoe, Cadair Idris, Y Garn and The Rhinogs. The routes range from Grade 1 scrambles like Crib Goch or Bristly Ridge, to riverside and forest walks. Includes details of a 2-day traverse of all 15 of Snowdonia's 3000ft peaks.
More information

The Ceredigion and Snowdonia Coast Paths

The Ceredigion and Snowdonia Coast PathsA walking guidebook to the Cleveland Way and Yorkshire Wolds Way National Trails, plus the Tabular Hills Walk. Crossing the North York Moors National Park, coastal scenery and quiet countryside, the three routes can be joined to create an easy circular route of over 250 miles (400km). Includes a 1:25,000 scale OS map booklet of the Cleveland Way.
More information

The National Trails

The National TrailsThis inspirational guidebook looks at each of the UK's 19 National Trails, with information that allows ease of comparison and contrast, inspiring you to find out more and to take up a long-distance challenge. Some Trails are short and easy, others much longer, many have strong themes - they may follow a coastline, or traverse ranges of hills.
More information

Social Media

Follow Walking Britain for the latest news.

Facebook Twitter

CBD For Walking & Hiking

Discover the benefits of CBD for walkers and hikers. More info.

Mountain Weather

Stay safe on the mountains with detailed weather forecasts - for iOS devices or for Android devices.

Digital Mapping Guide

Digital Mapping Guide - a simple guide of how to start using digital mapping. Includes advice and useful links.