The B74 is a medium-length B-road in west County Londonderry.
The road starts on the A6 to the west of Dungiven and heads southwest across the fields. It soon reaches Feeny, where it turns more northerly and continues into Claudy. The road ends soon afterwards back on the A6 at Killaloo.
The original route of the B74
On classification in 1923 all the above was actually the A6. The B74 took the more direct (but not as flat) route to the north between Dungiven and Killaloo. In the 1960s the two roads swapped routes, giving the A6 and B74 their current routes in the area. The A6 has been upgraded since gaining Class I status.