Thi is something I've always wonder...well not so much how do they do it, but how did they even get into mtbing in the first place?
Where I live, cities arn't that big, 80,000 people here, and the biggest city in the state is like 200,000, heck there is only 500,000 people in the whole state. So you're not more than a 10 minute drive from decent trails.
But in cities of millions, how do people even get involved? I see posts of people in the US that drive like 4 hours to the trails, 4 hours gets you to every trail network there is around here.