Distances vary depending on the location and race organizer.
The World Triathlon hosts the Duathlon World Championships each year, which is a standard distance race consisting of a 10KM run, 40KM bike and a 5Km run.

At our LOCAL events in Zimbabwe the distances on offer (subject to change) are – 

FUN – 1.25KM RUN – 5KM CYCLE – 1.25KM RUN
FIT/SUPERSPRINT – 1.25KM RUN – 10KM CYCLE – 2.5KM RUN
SPRINT – 2.5 KM RUN – 20KM CYCLE – 5KM RUN
(** if there is a demand – STANDARD – 5KM RUN – 40KM CYCLE – 10KM RUN)