Pick up your free "In Training" shirt, visit with official charities, running clubs and sponsors. If you didn't get into the Chevron Houston Marathon or Aramco Houston Half Marathon race last year, this event is the place to be to learn how to get a guaranteed entry, even register the same day. The popular Under Armour performance shirt will be on sale for only $20. No matter where in the Park you happen to be, jump on the Run for a Reason courtesy shuttle and join the party.