Ever wonder how marathon courses are measured? Here is how they do it!
Measurement procedures outlined in this booklet are those prescribed by IAAF/AIMS for the measurement of IAAF and AIMS races. The IAAF will only recognise times on courses measured by this system for world records, qualifying times for Championships, etc. All races wishing to apply for an IAAF Road Race Label must have been measured by an approved A or B Measurer.
- The Measurement of Road Race Courses