Accurate measurement is important for a successful race. Runners expect consistency. Most runners like to compare performances run on different courses, and such comparisons are difficult if course distances are not reliable. No one can truly establish a personal best if the course distance is not accurate. A special measuring wheel is used and takes some time and experience to do properly. If you want your race to attract top competitive runners that may be eligible for official records, the you should have your course certified by USAT&F standards. For any road running performance to be accepted as a record or be nationally ranked, it must be run on a USATF-certified course. There is a very complex formula that guarantees a course is not short and must be performed by an approved certifier and submitted to USAT&F for approval. A certification number is issued and is good for a number of years. Contact bob@eerunner.com for measurement and/or certification and accurate timing of your event. www.island-timing.com