This depends on how many horses and traps, pedestrians / walkers, and bikes that you must maneuver around. From Kate Kearney’s Cottage, considered the beginning of the Gap, to the entrance to the Black Valley is around 8 km. However, you’ll be driving at a snail’s pace. And don’t expect to be able to fully take in the scenery. You’ll need to keep your eyes on the road, so you don’t hit anyone. It’s better just to either walk or schedule a jaunting car ride or get started very early so you can finish the route before the crowds arrive.