A USATF-certified course is a road race course whose distance has been certified for accuracy.
Courses must be certified for any road running performance to be accepted as a record or to be nationally ranked. Furthermore, running a race on a certified course allows you to accurately compare your time to performances run on other certified courses because you can be sure the distances were the same. No one can truly establish a personal best if the course distance is not accurate.
Race Directors: Click here for information about how to get your course certified