Route 204, also known as Southwest Arm Road, is a 30.5-kilometre-long (19.0 mi) east–west highway on the island of Newfoundland in the province of Newfoundland and Labrador.

It connects the communities along the southern shore of the Southwest Arm of Trinity Bay with the Trans-Canada Highway (Route 1) at North West Brook.

It is a very curvy two-lane highway traversing very hilly terrain for its entire length.

[1] Route 204 begins at an intersection with Route 1 (Trans-Canada Highway) in North West Brook and it heads north to pass through downtown and have an intersection with Harbour Drive, which provides access to Ivany's Cove.

Route 204 now makes a sharp left turn and heads northward for a few kilometres before entering Southport and coming to a dead end in a neighbourhood just past the town's harbour.