At my recent birthday, I entered a new "age group" (which is one of the few good parts of getting older) in running, so now I'm one of the youngest guys in the group, instead of the oldest.
On my birthday, with very little training, I ran 1 mile in 5:28. Not bad, but it's a pace I used to be able to keep up for a 10k. Now that's all out. I plan to work on my overall speed this fall, and will be trying to bring that down. Stay tuned.