Join Date: Feb 2010
Location: Loudoun County, VA
If you don't own a horse, you'll have to find a horse. I'd suggest talking to whoever owns the horse your currently ride, and they will be able to advise you on where you can show.
You are pretty limited on where you can show when you don't own a horse. You also need a truck and trailer to transport, and your own tack. If you are able to borrow all these things, whoever you borrow from should have good advice on where to show in your area.
I don't know what discipline you ride, but you can look for shows in your area that have "Schooling" in the title. They are usually lower key, less expensive, and are good practice to learn how shows operate.
Also, try just attending a show without a horse to see how it operates. Shows always need volunteers!
To summarize, you really need to talk to your current horse network to figure out how you can show.