Robair Robair:
How long does it take to walk Mexico end to end anyway?
The shortest foot path would be approx 1,365 km in length, average walking speed is 5kph.
273 hours of continuous walking. Approx 11 1/2 days of 100% continuous walking.
Granted, this assumes that a human can walk at average speed over the entire length of the shortest path, which is not possible. Add in that they aren't walking the shortest path, if media maps are to be believed.
Honestly, if I was doing it, I would put it between 35-40 days, for the shortest path. Double that if I have to bring the family! (I would be hard pressed to maintain 8 hours continuous at the average pace, no chance I maintain that with family).