Route 48 begins on the east side of the river that runs over the west waterfall on Route 47. Almost immediately, it crosses over the river by way of a bridge, toward long grass. Various Pokémon can be found in the grass. North of the grass, another bridge crosses the river again, and the route ends at the Safari Zone Gate.
A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here.