The active section continues running west-southwest through the northern sections of Kanata, and then turns northwest at Huntmar Drive, where a major road bridge over the lines was built. The line continues northwest for the run to Arnprior, taking a brief turn to the east at Kinburn just before entering town. The line was routed around the western side of downtown Arnprior, and crossed the Brockville and Ottawa Railway on the town's northern edge. The line continues along the same basic northwest alignment to Renfrew, where it crossed the Kingston and Pembroke Railway just west of town at what was known as Renfrew Junction.