I am looking a map that briefly details all that characters encounter (basically what pokemon and their numbers and characters) when travelling during the season of Indigo League. Sure there are the episode details in Bulbapedia but it makes distance hard to judge. Has someone already created such a type of map?

Found a map on Reddit of Ash's journey. Details only the path, not the characters, Pokemon, or number of episodes.
Reddit Kanto Anime Map.jpg

Wandered all over the place. Already feels too full of information, honestly. Includes some amount of guesswork as well, due to anime-exclusive locations.

Example: The route from Celadon City to Fushcia City. Earns the badge in Episode 26. Implies a path through Saffron City in Episode 29, given a Fighting-type tournament and a gym. Passes through Gringy City and a dam construction area before reaching Fushcia City in Episode 32. Where would you place this information?

Might find Serebii's information on episodes helpful for creating your own map, if so desired. Lists the characters, Pokemon, and who the Pokemon belong to (if anyone) on each episode's page.

So it is correct to say that the Pokemon Red and the Indigo League share all the same locations but anime has more? Any chance you could explain the map a little. I can get that the ? numbers join up but I get a little lost as some expisodes don't seem to have any means to join up.

Yes. Visits most of the places in Pokemon Red. Added several nameless locations and some named ones in the anime. Travels to Porta Vista and Maiden's Peak (both port towns) after the sinking of the SS Anne, as an example. Heads to Saffron City from there.

Labeled this map a bit strangely. Hooks up the big pink-ish ?1 and ?2 between Celadon and Fushcia with the example from the earlier post. May be easier to list locations for the small purple ?1 and ?2 area. Begins this list at Cinnabar Island to help orient you.

Episode 56-57: Cinnabar Island
Episode 58: Heading to the mainland, likely north
Episode 59: Cerulean City
Episode 60-61: Viridian City
Episode 62: A circus on the way back to Pallet Town, so likely Route 1. Ends in Pallet Town.
Episode 63: From a beach to the North Pole. Rescues a Jynx for Santa.
Episode 64: Somewhere cold. Gets caught in a snowstorm, though. Apparently intended to air this after Episode 37 (Pikachu's Goodbye). Shuffled it around after removing Cyber Soldier Porygon.
Episode 65 (?1): New Island. Contains a secret laboratory. Created Mewtwo there. Is located near Pallet Town, supposedly.
Episode 66: Seafoam Islands
Episode 67 : Probably near Seafoam Islands, or perhaps south of Fushcia City. Went surfing. May be the start of "?2" on the map.
Episode 68: Starts in Pallet Town. Goes to Xanadu Nursery (a greenhouse) nearby.
Episode 69: A movie set
Episode 70: Starts in Pallet Town. Goes to Hollywood. Might be the last "?2" location.
Episode 71: Starts in Pallet Town. Goes to Mt. Hideaway.
Episode 72: The ruins of Pokemopolis. Suggests Pallet Town to be the closest town.
Episode 73: Starts in Pallet Town. Heads to Indigo Plateau. Sees it at the end of the episode.
Episode 74-80: Pokemon League

Spent a lot of time somewhere near Pallet Town, but not in it.