Route 109 is a highway in New Brunswick, Canada; Its western terminus starts along the Tobique River on Route 105 in Perth-Andover. The route travels east where the route is known as Gulch Road passing through Craig Flats, Quaker Brook and Currie where it begins following the Tobique River again. The route then passes through Licford and Arthurette where it crosses the Tobique River briefly merging with Route 390 from the south side to the north side continuing to follow the river east.