This article is about the Class III road numbered C13 maintained by Argyll and Bute Council. For other roads numbered C13, see C13.
The C13 starts behind the iconic round church at the top of Bowmore's round church and cuts south east across the island to meet the B8016 at Laggan Bridge. It is an unremarkable road, dotted with odd houses, between fields, many of which have been built in recent years. As with many of the roads on the island, there are a series of long straights, and the eastern end of the road, dropping down to Laggan Bridge, crosses rough moorland.