Route 231, also known as Random Island Road, is a 33.6-kilometre-long (20.9 mi) east–west highway in the Canadian province of Newfoundland and Labrador.

It immediately leaves town and heads east to cross the Hefferton Causeway onto Random Island.

The highway now passes along the southern coastline of the island as it goes through the communities of Random Heights and Elliott's Cove, where Route 231 intersects with a spur road leading to Snook's Harbour.

Route 231 now passes through Weybridge, Lady Cove, and Robinsons Bight before turning more inland and having an intersection with a spur road leading to Hickman's Harbour.

Route 231 now curves back to the northwest to pass through Middle Lance Cove and Petley before coming to an end at the edge of the asphalt pavement just outside the latter community, with Random Island Road continuing west as a gravel road.