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.