Waihinahina Park is a huge, flat, grassy and scenic area, popular with locals. It can be muddy though.
Trelissick Park is a fantastic off-leash area in Ngaio, Wellington. This valley walk goes alongside Kaiwharawhara stream for around 2.5 Km. The railway runs on the other side of the stream and higher up the hill, and there are historic ruins to see along the way.
Seton Nossiter Park off-leash area in Wellington runs for around 750 metres beside a stream in a Flood Detention Area. It’s pretty much flat and grassy and allows plenty of space for dogs to run.
The Ataturk Memorial off-leash area is the second most popular dog exercise area in Wellington.
Prestons Gully, off Murchison Road in Happy Valley, Wellington, New Zealand offers a large, flat, grassy area bounded by hills and a fence. It has plenty of space for small and large dogs to run.
Kainui Reserve — Treasure Island is a small fully fenced and enclosed patch of grass right beside a busy road in Evans Bay, Wellington, New Zealand. It’s popular with locals.
Wright’s Hill Parade Ground off-leash area in Wellington is a large, flat, grassy area surrounded by bush. Highly recommended.