Think that would be an average of 18.13km/h it is very fast!! I only took the complete distance ( to my best recollection) and the time it takes me to finish it, ie. 16km loop in 1 hour. The stretch up to the blockhouse takes me about 21mins ( 10.85km/h ) but the rest of the track is quite fast. Not about speed , I do it for fun! I'll cycle 10km/h if I can have a chat whilst at it...