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Cwm Penanmnen and Sarn Helen Walk

By Dave Roberts   

on January 19, 2012    No ratings yet.

Cwm Penanmnen and Sarn Helen Walk

Further Details

Route Summary:

Route Start Location:

7.59 km 285 m

Calculate the time using Naismith’s Rule and factor in your own pace.

Activivity Type: Easy Moderate Walk, Mountain Biking, Trail or Fell Runs

Summits and Places on this Route


Check out the businesses nearby for more places to stay and drink.


Remember that we cannot outline every single hazard on a walk – it’s up to you to be safe and competent. Read up on Mountain Safety , Navigation and what equipment you’ll need.

Parking :

Public Transport:

Traveline for UK Public Transport

Recommended Maps


Weather Forecast:

Met Office Snowdonia Mountain Weather

Check out our Best Mountain Weather Forecast?

Cwm Penanmnen and Sarn Helen Walk Ordnance Survey Map and GPX File Download

Download file for GPS

Cwm Penanmnen and Sarn Helen Walk

The valley of Cwm Penmnen lies to the south of Dolwyddelan and is steep sided and afforested. Through this valley, the Romans chose to build the famous Sarn Helen, which can still be followed over the moors towards Ffestiniog.

Most of this route can be mountain biked and the final section of footpath avoided by taking the minor road.

The Route

View the route in full on the Snowdonia National Park website – here.

Dave Roberts founded Walk Eryri in 2004, with the aim of providing routes that are off the beaten track. Walk Eryri is now part of Mud and Routes which continues to provide more off beat routes and walks in Snowdonia and beyond. Dave has been exploring the hills of Eryri for over thirty years, and is a qualified Mountain Leader. Dave also established Walk up Snowdon, Walk up Scafell Pike and Walk up Ben Nevis just to mention a few.
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