The Grey Mare and her Colts is a megalithic chambered long barrow located near Abbotsbury in Dorset, England.

The tomb was partially excavated in the early nineteenth century, and was found to contain human bones and several pottery fragments.

[1] Long barrowed megalithic tombs are burial monuments built during the Early and Middle Neolithic periods (3400-2400 BC).

They can be identified as mounds of stone or earth and typically hold one or more wood or stone-lined burial chambers.

The Grey Mare and her Colts burial monument was partially excavated in the early nineteenth century.