Garreg-ddu Reservoir

Garreg-ddu Reservoir is an artificial lake near Rhayader in Wales. It fills a mountain valley with deep, dark water bordered by evergreen forests and rocky slopes on all sides.

The reservoir was built in the mid-1900s to supply water to industrial towns in the region. It forms part of a system of interconnected dams and lakes that work together to manage water flow across Wales.

The site is reached by a narrow mountain road that winds through the valley, with viewing points along the way. The weather here changes quickly, so bring a windproof jacket and wear sturdy shoes for walking on uneven ground.

The water here is distinctly dark and peaty, colored by the moorland that surrounds it. This natural tint gives the lake its moody appearance, which shifts throughout the day depending on light and weather.

Location: Rhayader

Address: The, Elan Valley, Rhayader LD6 5HS, UK

Phone: +441597811515

Website: https://elanvalley.org.uk

GPS coordinates: 52.26667,-3.60000

Latest update: December 6, 2025 19:06