Well, the short answer is hard work, a balanced lifestyle and perseverance.
Not what you clicked on this link to find? Understandable. Neither would we!
Although all those (plus many other) are essential to moving from the 5k to a full marathon, it’s also about approaching this increase in training (and racing) miles wisely and with great patience.
We have found great success following Hal Higdon’s Training Programs (link to website). There are multiple, free, training plans for novice to experienced runner. In addition there are racing plans for all different distances which helps, as it is imperative to take this one step at a time and build up (race by race) to the full marathon.
Hal Higdon created his plan with this in mind, and the focus remains on a healthy progression to build up to that dream race. With time, you’ll be surprised how simple it is to accomplish this age old race goal!