It is part of the A39, connecting Porlock to Lynmouth and Barnstaple in Devon and is the steepest A-road in the United Kingdom, approaching 1 in 4 (25%) in places.

[5] Porlock Hill is not recommended for caravans or HGVs, which are strongly advised to seek another route.

In 1812, the local community was fined for not maintaining a good road, and builders were employed to construct a suitable route.

On 19 August 1900, Selwyn Edge became the first person to drive a motor car up Porlock Hill, winning a £50 bet in the process.

In 2015, over a hundred racers competed for a £3,100 prize to cycle up the hill along the toll road, followed by a series of children's races and a general fun ride.