Do Greyhounds Like To Go For Long Runs, Such As Training For Marathons With Their Owners, Or Only Shorter Runs?

I like what greyhounds look like and the idea of saving a dog. I like to run long distances. Do greyhounds like to run long distances with their owners or just shorter distances? How far do they like to run each day? I can’t have one right now but when I get to the right place and time, I would really like to look into having one or two greyhounds.