Kanto Route 9/Route description

Heading east from Cerulean, the route quickly utilizes the rocky terrain of the area, hopping down a ledge and passing a Trainer, making this portion of the route a one way, eastbound only passage. Turning east, the route passes an opening to the south that leads to another Trainer and in Generation I, or  in Generation III. Moving away from the passage, Route 9 comes to a four-way intersection. To the north is the one way, westbound only passage that returns to Cerulean and is occupied by two Trainers and a grassy area containing wild Pokémon. To the south is a long passage that ultimately results in a dead end, containing one Trainer and a in Generation III. The main path of Route 9 takes the east fork.

To the east of two hills connected by ledges, the route turns north into the path of another Trainer. The route also comes to a three-way intersection here, with a fork to the west leading to yet another Trainer and a small patch of grass. Route 9 continues northward, turning east, passing another Trainer and turning south to the northeast of another small hill. After hopping another ledge that makes the passage east of the four-way intersection a one way, eastbound only path (and which utilizes the dead end passage, which is bordered to its north by a ledge for most of its length, as the westbound only path), the path crosses ways with another Trainer as it turns east.

Just east of the Trainer is a pair of ledges that allow Trainers heading west from the Rock Tunnel to reach the four-way intersection that ultimately leads to Cerulean. Farther east, the route comes to an end at the western extent of a large grassy area, at which the path becomes Route 10.

In Generation I, to get to Lavender Town and Celadon City, the main character would have to travel the length of the route to reach the Rock Tunnel on.