
To me it would be very surprising if USATF had not considered at some point in time the validity of courses that are entirely withing the confines of a parking lot. The USATF 5k racewalk championships has been held in Kingsport, TN for several years on such a course. One of the advantages as I see it of using a parking lot for a short course from a race management standpoint is that it does not require road closure, only a parking lot that can be easily closed off or is not used on evenings / weekends. The USATF 5k championship course map is copied below:
