A few days ago someone posted asking about a site where you could choose a track and log your distance, and it would virtually walk/run that track for you, and you'd see information about the track at various points as you achieved those distances.
Well, there's such a thing now for New Zealand! www.lovenzchallenge.com
Until April next year you can register to cover the entire country or just the North Island (3,000 or 1,500 kms). You can add mileage from anything that gives you mileage. There are also prizes.