Yes! As soon as each race reaches its caps you will need to opt-in to be placed on the waiting list. You can sign up for the waiting list by going to RunSignUp and following the prompts.
If a spot opens up, you will be notified via e-mail and you will have 48 hours to register from when the e-mail was sent. If you do not register within 48 hours you will be removed from the list. The Boilermaker is not responsible if your e-mail notice goes to your spam folder.