How do you use the word marathon in a sentence?

Here are a few sentences using the word "marathon" in different contexts:

* Running: I'm training for my first marathon in the fall.

* Lengthy: The meeting turned into a marathon session, lasting well over three hours.

* Effort: Finishing this project will be a marathon, but we can do it.

* Challenge: The software update was a marathon of debugging and troubleshooting.

* Distance: The marathon is a 26.2 mile race.