Suspension Bridge Track in Hunua Regional Park can be done as a loop from the car park at the start of Otau Rd, the main access road to Wairoa Dam and reservoir. The swing bridge can be found at the start of the track just below the car park. It is spectacular, being at treetop level and high above a ravine.
After crossing the bridge, the track mostly follows along a ridge through regenerating bush for about 40 minutes. There are a couple of good viewpoints, but the best part of the track is a large group of tanekaha (NZ native “celery” trees) as you approach the main reservoir viewpoint. The trees are common, but seeing such a large collection together is unusual.
From the main viewpoint over the reservoir and dam, you can walk down to, then along, the dam. Then take the road back to the car park or walk back along the track. There is also a large grassed area below the dam suitable for picnics. Allow about 90 minutes of walk time for the entire loop.