Source engine maps sizes are limited to 32768x32768.

This map's size is about 6.7E11x6.7E11 (670 billions)

Which is about 4.5E23 larger that source engine maps. (45 sextillions)

It would take 120 years to cross the map walking,
60 years running,
and 24 hours at max noclip speed without breaking the game (26000 to 27000)