During middle school it was all about flag football, which we played in the spring and summer. It always turned into tackle football.
While I was there I learned I could run faster than everyone else. So, I went to high school, and into cross country. I would run 3.1 mile races in 17 minutes. It was great. Training was the best, at about 8 - 12 miles a day. (very, very meditative!)
My cross training was mountain biking off road.
I still mountain bike, everyday as a matter of fact. (How else should I get to the train station?
) We have an
aqueduct which goes through town so I get my off road kicks on that in the mornings.
(That link will also give you a little glimpse of the area I live in)
I also have taken up Ryu Renshi Dan karate which is a mix of shotokan, isshin ryu, and goju-ryu karate styles.
(I'm making their site now, you'll see it soon 'nuff)