As part of their Summer Programme, the Department of Conservation at Pureroa have a one-off helibiking excursion from Top of the Mountain in Pureroa. The track you follow down will be come part of the national cycleway eventually but they are still in the construction stage at the moment. The cycle track will eventually be around 70km long and will follow an old tramline which means the gradient is going to be accessible to most.
I loved the chopper ride, though I did have to ask the pilot to stop texting at one stage!! Was an awesome view of the forest from above … and a fun trip down. No uphills, fabulous!