The Monmouth Railway, also known as the Monmouth Tramroad, was a horse-drawn plateway of 3 ft 6in gauge. It ran for about 5 miles (8.0 km) from Howler's Slade, east of Coleford, in Gloucestershire and Monmouth; there were two branches from other mineral sites. It was intended to bring mineral products of the Forest of Dean to Monmouth, and to the works alongside the River Wye. Some fragments of bridge structures and a short tunnel survive at present, and part of the route can be surmised from aerial photographs.