A very steep road (15%) to Ffynnon Llugwy
Ffynnon Llugwy is a natural lake at an elevation of 554m (1,817ft) above the sea level, located in Snowdonia, in northern Wales. It’s one of the highest mountain roads of the country.
Located at the feet of the Carneddau mountain range, the road to the summit is paved pretty narrow. The road to the reservoir is owned by the power/water company and closed to private vehicles.
Starting from the paved A5 Road, the ascent is 2.54km (1.58 mi) long. Over this distance, the elevation gain is 262 meters. The average percentage is 10.31%. The maximum gradient is 15.0%.