Yesterday, I hiked from the Cascades Kauri Park through to Bethells Beach, and back. I think it was the Montana Heritage Trail for most of the journey, but I also think I went off that a little bit.
Highlights of the hike were the green rain forest, some massive inland sand dunes, a waterfall (that I wasn't expecting), and some great views of classic, rolling hills.
According to the iHealth function on my iPhone, I walked about 30km and the entire journey took me just under 5 hours. I'd highly recommend it if you've got a spare day in Auckland, as it's a great way to see some awesome and varied New Zealand scenery.
If you liked these hiking pictures, you might also like the ones I took last week when I hiked The Pinnacles or this post with more general pictures of New Zealand.