Ashorty and winding road

the service road for Stwlan Dam, Tanygrisiau, Blaenau Ffestiniog is normally closed to traffic but is a popular route for hikers and cyclists. From the Tanygrisiau lake to the dam is nearly 2miles, with an average gradient of 20%

Stwlan dam was built in the 1950s to hold the head waters of the Ffestiniog pumped storage hydroelectric generating station, the first of its kind in the UK