The Devil's Highway was a Roman road in Britain connecting Londinium (London) to Calleva Atrebatum (Silchester) via Pontes (Staines).

The London portion of the road was rediscovered during Christopher Wren's rebuilding of St Mary-le-Bow church in 1671–73, following the Great Fire.

[1] The road ran straight from the bridgehead on the Thames to what would become Newgate on the London Wall before passing over Ludgate Hill and the Fleet, separating into the Devil's Highway and the northwest stretch of Watling Street, going on to Verulamium (St Albans).

The underlying subsoil and geology consists of sand and gravel, and the whole area will have been heathland before the recent plantations of Scots pine and Sitka spruce.

It passes about half a mile to the south of Caesar's Camp near Easthampstead, where a smaller road connects to the southern entrance of the hillfort.

From Crowthorne, the main highway exists as a sand track and footpath through woods and scrub, and at one point (behind Finchampstead Ridges), it crosses a bank which forms the dam to a shallow lake known as Heath pond.