I think I would like to try to run a marathon one day.
Good for you!!!  Keep in mind that a marathon is 26.219 miles long, so you will need to train ahead of time.
That is super far! I dont know if I will be able to do that.
They hold marathons to commemorate the run of  Pheidippides, a Greek messenger who reported the armies win at the battle of marathon in 490 BC
That is really interesting I had no idea
Keep training.  If you get good at marathons, you could go to the Olympics!!!  The marathon was one of the original Olympic events.
I will keep training and maybe one day.
Never give up.  Pheidippides made the entire run in one go, then collapsed and died after he delivered the message.  That is commitment to a cause.