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IAAF Rule 260.8

The IAAF now recognises World Records in road races for the following distances: 10km; 15km; 20km; Half Marathon; 25km; 30km; Marathon (42.195km); 100km; Road Relay (Marathon distance only). IAAF Rule 260 states that the following criteria with regard to the course must be complied with in order for a World Road Record to be ratified:

1. The course must be measured by an “A” or “B” IAAF/AIMS approved measurer as defined in IAAF Rule 117.
2. The start and finish points of a course, measured along a theoretical straight line between them, shall not be further apart than 50% of the race distance.
3. The decrease in elevation between the start and finish shall not exceed an average of one in a thousand, i.e. 1m per km.
4. Either the course measurer that certified the course or another “A” or “B” measurer in possession of the complete measurement data and maps must validate that the course measured was the course run by riding in the lead vehicle.
5. The course must be verified on site within two weeks before, on the day of the race or as soon as practical after the race, preferably by a different “A” or “B” measurer from the one that did the original measurement.
6. Road World Records set at intermediate distances within a race must comply with the conditions set under Rule 260 and be timed according to IAAF Rules. The intermediate distances must have been measured and marked during the course measurement.
7. For the Road Relay, the race should be run in stages of 5km, 10km, 5km, 10km, 5km, 7.195km.”