hello, I would like to know if there is an official starting and finish line for the GTA five map's cannonball run.

Meaning: the fastest one can travel in a land vehicle from one side of the drivable map to the other CATEGORY?

i just need to know where to be training, anybody got any ideas of where it should be if it doesn't exist?

As @CyanWes told you when you first posted this, ask in the game’s forum.