The route continues northeast and east around the northern edge of Bahia Grande before reaching the southmost edge of Laguna Vista. The route then turns southeast, running along the coast of the Laguna Madre. Continuing southeast, it passes through the town of Laguna Heights, before reaching the city of Port Isabel.
The route proceeds northeast and east along the northern edge of Bahia Grande before reaching the southmost edge of Laguna Vista. The route then shifts southeast, following the coast of the Laguna Madre. Continuing southeast, it passes through the town of Laguna Heights, before arriving in Port Isabel.