there isn't a route 111 in fire red OR leaf green
but your looking for route 11 it is going from Vermillion city, past digletts cave up to route 12 its easy to get to route 12 if you have given the police Guard the cup of tea ;)
look on your map
Near route 111
The earliest route you can get it at is Route 4.
route 111
In Pokémon FireRed, there is no true desert area like in some other Pokémon games (e.g., Hoenn’s Route 111 in Emerald). However, the closest area with a desert-like environment is: 🏜️ Route 111’s Desert (NOT in FireRed) This desert is in Pokémon Ruby, Sapphire, and Emerald, not in FireRed. Closest FireRed Alternative: In FireRed, the most similar place is Kindle Road and Mt. Ember on One Island, which have dry, rocky, and volcanic terrain—but it's not an actual desert. If you're looking for Ground-type or desert-themed Pokémon, you can find some (like Sandshrew or Cubone) in areas like: Route 4 Rock Tunnel Victory Road
that's becuz route 111 is in the hoenn games. in kanto games the highest number route is 25
The available bus routes from Orlando to Bus 111 are Route 8, Route 50, and Route 125.
Route 22
That is at the bottom of Route 111
You get trapinch in emerald in route 111 where route 112 meet
route f
route 3or4