There certainly is :-)
Tuesday evenings are JFK track building at Makara Peak.
Make your way to the end of North Face, and follow the 180degree left hand switchback from there. The gang are 200-250m along the track, which is prefectly ridable to that point.
Any time between 5 and 8:45
Some people ride in, others walk up from Alington rd..
See you there !