The Lang Ayre is a beach on the west side of Ronas Hill, Northmavine, Shetland. At 1 kilometre (0.6 mi) in length it is the archipelago's longest. It is accessed either by a long walk from the top of Collafirth Hill down the Burn of Monius, or by sea. The beach's sand is red, eroded from the up to 700 feet (210 m) high red granite cliffs towering above it.