The highway also carries the designation of Baccalieu Trail for its entire length.

The highway begins following the coastline as it passes through South River, Clarke's Beach, and North River before passing through Bay Roberts, where it has an intersection with Route 72 (Port de Grave Road).

Route 70 now passes through Spaniard's Bay and Tilton, where it has an intersection with Route 73 (Back Track Road), before winding its way through hilly terrain to pass through Harbour Grace.

The highway now turns inland again through grasslands to enter Old Perlican and have an intersection with Route 80 (Trinity Road/Blow Me Down Road).

It winds its way south through town to come to an end at Bay de Verde's harbour.