The Marathon course of 26 miles 385 yards and the Half Marathon course of 13 miles 192.5 yards is classified as a multi-terrain course, along with the 10 km race.
The Bungay Marathon and Half Marathon had measurement accuracy certificates until 2013. In 2014 both officially became multi-terrain courses. The courses therefore do not have current measurement accuracy certificates, but have Statements of Course Measurement. The surface of a path (1.7 miles long) had deteriorated to the point where measurement accuracy was no longer sufficient. The course itself has not changed. The 10 km course uses the same path and is therefore also classified as multi-terrain.
The marathon course is 2 laps of a 13.1 mile loop through the scenic Waveney Valley of Suffolk and Norfolk. The half marathon course is one lap of the same loop. The 10 km course shares parts of the same loop.