The R238 travels north from the N13 at Bridge End. The road travels along Lough Swilly to reach Buncrana. From there the road proceeds inland to Carndonagh. After Carndonagh, the road goes to meet the Lough Foyle coast at Moville. From Moville the road proceeds southwest to end at the County Londonderry border just past Muff. The R238 is 88.1 km (54.7 mi) long.[1]