Blue Vein is a hamlet about 1 mile (1.6 km) south of Box, Wiltshire, England.

[2][3] The Bricker's Barn Trust constructed a London-Bath turnpike route further north in 1761 (now the A4).

[5][6] In the 18th century the Blue Vein turnpike marked the end of the Lacock Turnpike Trust's road from Lacock, before travellers had to cross the open ground of Kingsdown towards the Bath Trust's road into Bathford.

[7] In 1737 the Horse and Jockey Inn was built 300 yards down the road to the south-east, where wealthy travellers could stay, and be met and escorted safely to Bath.

[7] Halfway between Blue Vein and the former inn, now known as Old Jockey,[8] lie three Bronze Age round barrows on the north side of the road.