Planning a day trip
I've not much luck finding a good map until I was on the actual trail.  
So here's a trimmed copy for downloading. 
We found the section with tunnels and bridges and took the kids for an afternoon cycle.
Auripo to Lauder
- 10.5 km
 - slightly down-hill
 - tail wind more often than not
 - viaduct >> tunnel >> tunnel >> viaduct
 - great views above, below, beyond the track
 
This map is a zoom-in of the above showing the 'fun' section; look for Auripo then Lauder.

