Before arrive to the race you should print the email confirmation that you receive, fill it with your data and sign it. You will receive the email confirmation a few days before the event, to be able to download and print it, so that you fill it in advance and avoid queues on the race day.
For legal reasons Spartan Race will not allow the participation of any runner without having signed the download sheet that matches the ID number. No exceptions will be made. Remember to bring it on the day of the test so you do not miss a great day.
At least you must arrive an hour before to be calm. In this way you will avoid problems with traffic or last minute problems, and a traffic jam will be nothing more than a 'nice obstacle' on your way to the finish line.