Sarn Helen

Mountain Biking

Sarn Helen | ©Si Panton

Sarn Helen

Mountain Biking

This accessible route, which lies to the east of Moel Siabod, gives a very enjoyable and classic mountain bike journey. It has great views, lots of history and some fine riding terrain. The first hill is quite fierce, and most will end up pushing here, but beyond that the riding is never too technically difficult or testing. There is a second climb which is steep, but this is much easier to ride, provided you are reasonably fit.

The narrow road on the other side of Pont Cyfyng takes you to a signposted byway and the first monster climb. The track is steep and loose here but improves as you head out onto open hillside where you might spot some hut circles. A descent through a forest leads you down to Dolwyddelan. The route skirts round on the south side of Afon Lledr before crossing back and attacking the key feature of the ride: the Sarn Helen Roman road. The ride continues through western side of the Gwydyr Forest and then heads back along the south side of Afon Llugwy to Pont Cyfyng.
The route is quite remote so make sure you have a map and compass, plenty of food and water, plus adequate clothing and bike spares. You should also tell someone of your intentions and estimated return time, just to be sure.


This is a wild mountain biking route as opposed to a purpose built trail, and as such it can be very challenging in poor weather conditions. In the very worst winter conditions the higher sections of the route may be blocked by drifting snow.


Start from the Bryn Glo car park just outside Capel Curig near Pont Cyfyng.

Safety & Access
More info on Mountain Biking View on map

Safety & Access

The publisher of this website accepts no responsibility for the way in which readers use the information contained therein. The descriptions and recommendations are for guidance only and must be subject to discriminating judgement by the reader. Advice and training should be sought before utilising any equipment or techniques mentioned within the text or shown in any of the photographic images. Mountain Biking is an activity with a danger of personal injury or death. Participants in this activity should be aware of and accept these risks and be responsible for their own actions and involvement.


View Slideshow

Travel Time

Sunset Sunrise

Sunset Sunrise




Feels like °C

Next 24hrs

iWitness Pro

Feeds from Heart of Adventure Partners accross North Wales


Books, Guides & Maps

North Wales Mountain Bike Guide

27 of the best mountain biking routes in North Wales.


OS Maps for area

Explorer OL18
Explorer OL23

Market Place

Powered by Heart of Adventure