Because of the weaker gravity, it’s easier to run a marathon on the moon or Mars.
However, neither colony has a single corridor or tunnel that allows for proper marathons.
Running a marathon on a treadmill isn’t Kosher.
And you don’t want to run that distance outside.
So, instead, both facilities have circular corridor arrangements that can be used as running tracks.
There’s no Heartbreak Hill or Broadway on Lunar Loop or Mars Station Perimeter. It’s all flat. And you pass the same offices and living quarters multiple times.
Just make sure that some prankster hasn’t shut a blast door.