The Barry O'Sullivan Memorial 5k follows a single-loop paved course that starts and finishes in the village of Dromahane, near Mallow, Co. Cork. Organized by the Dromahane Roadrunners AC, the route travels through the surrounding rural townlands on quiet, marshaled country roads. The course features the rolling hills and steady drags characteristic of the North Cork landscape. Runners navigate a scenic circuit that begins near the heart of the village before returning toward the finish line.