Ffordd Pen Llech

Ffordd Pen Llech, the steepest road in the UK (37.45%)

Located in the settlement of Harlech in north Wales, Ffordd Pen Llech is said to be one of the steepest paved roads in the world with a 37.45%% maximum gradient.

The surface of the road is paved. It’s one of the steepest, toughest and most spectacular climbs in the country. Located within the Snowdonia National Park, the road is so steep that vehicles have been banned from driving up some parts in a bid to avoid them getting stuck. 

Brutal is a word used often in cycling, but there isn’t a better one to describe the climb. The street is a single-track road for the majority of its length. The climb is 0.3km long with an elevation gain of 51m. The average gradient is 20 per cent. To avoid problems with vehicles meeting on the slope and being unable to restart, the northern half has been made a one-way street for the main descent. It’s one of the truly definitive climbs. An alternative unrestricted route up the hillside is also available, where the gradient is a mere 25 per cent.


NOTICE: Due to the spread of COVID-19, many points of interest and roads are closed and travel is not recommended. Please follow all local health authority directives before venturing off, and stay safe.