I love to go hiking, I wonder if it is popular in other countries.
I'm a big hiker as well. Last year i actually completed the Continental Divide Trail 3100 miles.  The term hiking is really only used in America and Canada. 
And what would be term in others countries ?
Hill Walking, Backpacking, Skipping to the Lew. 
Ho, that is interesting and where the Continental Divide Trail is located ?
It runs from Canada to Mexico. Hiking that trail was the best 5 months of my life.
That is over 20 miles per day, that is a lot, and it goes through which states/provinces ?
The year prior I used the Appalachian Trail as a training tool for it. 
And before the Appalachian trail ? Did you hiked a lot ?