(Detour from Route 110)
Once you have Surf, you can cross the river in this route to have a shortcut leading back to Oldale Town. Using Cut to clear the way, you can harvest Leppa Berry x4, and Chesto Berry x4 in the soft soil in the western side of the woods. There's also a few trainers that you need to fight along the way.
Aroma Lady Daisy (Prize Money: P544)
Twins Amy and Liv (Prize Money: P128)
Poke Fan Miguel (Prize Money: P1,088)
Fisherman Andrew (Prize Money: P512)
There's also a Guard Spec at the southern part of the shore. Once done, backtrack to Route 110.