I'm 59 years old and haven't run in about 15 years.
I live within walking distance of the best running trail in Houston, Tx., called Memorial Park. It's got a 3.1 mile running trail around it. I've recently lost some weight and I think I might attempt a loop around the Park again. I know a little about running, and I'm aware I should go very slowly (probably a walk/run combination) and stretch real well, both before and after.
But, that would be a good comeback after 15 years. In 1988, on Election Day morning, I was running at Memorial Park (I did it daily back then), and along came GHWB and the secret service detail. Here it was election day and he was getting his run in!