|Length||16.5 mi (26.6 km)|
|West end||Wyesham, Monmouth|
|East end||Huntley, Gloucestershire|
The A4136 road is the main road through the Forest of Dean in Gloucestershire, England and Monmouthshire, Wales. At its western end it connects to the A466 road at Wyesham, which is a short distance from Wye Bridge and the A40 road at Monmouth. Its eastern end at Huntley, Gloucestershire also connects to the A40. It is 16.5 miles (26.6 km) long, a shortcut of approximately 3.8 miles (6.1 km) relative to the A40.