If you'd like to Switch Races, which is defined as switching distances (such as from the 5K to the 10K, or from a half marathon to the 10K, etc.), look in your email inbox to find your Race Registration Email Confirmation. On the Emai Confirmation you'll find a button labeled EDIT. Click on the EDIT button. This will take you to the registration site and you can make allowed changes. Once on the registration site, click on the "Update Category/Distance" button. Please note, you will be charged the difference from the entry fee you paid to the current fee for your new chosen distance. If you cannot find your email confirmation, click here and click on the Confirm Registration button.