Vallay is an uninhabited tidal island

Tidal island

A tidal island is a piece of land that is connected to the mainland by a natural or man-made causeway that is exposed at low tide and submerged at high tide. Because of the mystique surrounding tidal islands many of them have been sites of religious worship, such as Mont Saint Michel with its...

 in the Scottish

Scotland

Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...

 Outer Hebrides

Outer Hebrides

The Outer Hebrides also known as the Western Isles and the Long Island, is an island chain off the west coast of Scotland. The islands are geographically contiguous with Comhairle nan Eilean Siar, one of the 32 unitary council areas of Scotland...

. It is linked to North Uist

North Uist

North Uist is an island and community in the Outer Hebrides of Scotland.-Geography:North Uist is the tenth largest Scottish island and the thirteenth largest island surrounding Great Britain. It has an area of , slightly smaller than South Uist. North Uist is connected by causeways to Benbecula...

 by a long beach

Beach

A beach is a geological landform along the shoreline of an ocean, sea, lake or river. It usually consists of loose particles which are often composed of rock, such as sand, gravel, shingle, pebbles or cobblestones...

 at low tide.

Once the island supported a population of nearly sixty people, its best-known inhabitant was the archaeologist Erskine Beveridge

Erskine Beveridge

Erskine Beveridge LL.D. FRSE was a Scottish textile manufacturer and antiquary. He was the owner of Erskine Beveridge & Co. Ltd., which had been founded by his father in 1832 and was the largest linen manufacturer in Dunfermline, Fife...

. The island is also known for its sea birds and for prehistoric monuments.

It is the smallest Scottish island to have an area greater than 1 square miles (2.59 km²).