A rail ale trail is a marketing exercise in the United Kingdom that is designed to promote tourism to a rural area, by encouraging people to visit a series of pubs that are close to stations along a railway line. Participants are rewarded for visiting the pubs by train. In doing this they increase the number of passengers on the railway and bring money into the local economy. The scheme is often supported by the Campaign for Real Ale. The beer is usually brewed locally and many of the pubs offer food as well.

The Tarka Line, also known as the North Devon Line, is a local railway line in Devon, England, linking the city of Exeter with the town of Barnstaple via a number of local villages, operated by Great Western Railway (GWR). The line opened in 1851 from Exeter to Crediton and in 1854 the line was completed through to Barnstaple. The line was taken over by the London and South Western Railway (LSWR) in 1865 and later became part of the Southern Railway and then British Rail. In 2001, following privatisation, Wessex Trains introduced the name Tarka Line after the eponymous character in Henry Williamson's book Tarka the Otter. The line was transferred to First Great Western in 2006.