One of the few routes un-affected by man, only the average pokemon can be found here. Though, Oddish and bellsprout seemed to have disapeared.

Walking
Caterpie, 30%
Weedle, 30%
Pidgey, 25%
Abra, 10%
Kakuna, 5%
Metapod, 5%

Old Rod
Magikarp, 5, 100%

Good Rod
Horsea, 5-15, 35%
Krabby, 5-15, 64%
Squirtle, 2-5, 1%

Super Rod
Krabby, 15-25, 69%
Horsea, 15-25, 25%
Slowpoke, 5-8, 3%
Psyduck, 5-8, 2%
Squirtle, 5-8, 1%