Running

I remember that just a couple years ago I could run for a 1/2 mile and I felt like I could run forever - and I did.  Those were great days.  I've been running a lot more recently, but I don't feel the same like I did just two years ago.  It's more difficult, but I still enjoy it.  Anyway, I think I'm going to try to do a half marathon this year.  What do you think?  Have you ever done a 5K, 10K, Half Marathon, or Marathon?

(Photo from Microsoft Free Images)