Garreg Lwyd (Rhayader)

Infobox Mountain
Name = Garreg Lwyd
Photo =
Caption =
Elevation = 499 m
Location = Powys, WAL
Range = Cambrian Mountains
Prominence = 206 m
Parent peak = Pegwn Mawr
Coordinates =
Topographic
OS "Landranger" 147
Easiest route =
Grid_ref_UK = SN942733
Listing = Marilyn
Translation = grey rock
Language = Welsh
Pronunciation = 'gæɾɛg li:d

Garreg Lwyd is a hill in Mid Wales, between the towns of Rhayader and Llangurig. It rises to the east above the A470 as it follows the Wye Valley. The Bryn Titli Wind Farm is situated on an area of flatter moorland to the north-west.