You can update your predicted pace and any information given during registration here (or http://www.imathlete.com/events/2017detroitmarathon/editreg) until August 28, 2017. After August 28, 2017 you can visit the Problems & Solutions Booth at the Health & Fitness Expo to update your predicted pace and corral.

We ask that you remain honest with your predicted paces and report to your assigned corral on race day.