Transition question

In most cases, there will be racks for you to put your bike on; they will be numbered somehow - usually, numbers x through y are on a rack and you can put your bike anywhere on that rack. I've heard people say that some races preassign you a spot on a rack.

I did however, do a really small non-USAT sanctioned race that had some racks, but not enough for everyone and I had to lay my bike on the ground. Not ideal, but it was fine.

There should be racks, and most races have a numbered spot for you.  That's where you will lay out your transition gear too (towel, shoes, race #, etc.) Try to be courteous to other participants and not take up too much room.  You can practice at home how you will lay it out and what steps you will do in the transition (1. wipe off feet, put on shoes and socks  2.  put on helmet...)

 Another piece of advice is to make a mental note of the location of the rack so you can quickly spot your rack and bike when you come out of the swim transition.