Based on the context and the answer, generate a question. 

Context: This was probably one of my favorite races to date . It was in this small community outside the north entrance to Yellowstone . It was a first annual fundraiser for the local grade school and there was only like 59 runners . I knew like 30 of them so it was great to be in that atmosphere surrounded by friends .

Answer:

They had trained for the marathon .



What may have happened before they participating in the marathon ?