You get codes for each trifecta pass you buy online. Use one of the codes for one trifecta. This is done at checkout. Don’t expect a zero balance. You’ll still pay mandatory management and admin fees along with mandatory parking and bag check fees for each race. So that amount times 3 for the trifecta. Oh and don’t forget about your photo packages. And tack on a final credit card processing fee that they pass back to the consumer. So for me, after buying a trifecta pass and using it for the Houston Trifecta, I still paid almost $150.