Māori used the hills and valleys of the area to travel between
Wairarapa and
Wellington Harbour. In the mid-19th century, the Sinclair family and other European settlers logged the lower valley for timber, including the site of the current regional park.
Water collection area In the 1880s, an earth dam and pipeline was established to collect fresh water from the
Wainuiomata and
Ōrongorongo Rivers. There are still remnants of the old logging tramways and old dam construction camp sites in the park. The rivers now provide about 15% of the region's drinking water. A geological survey route was built in the 1970s, to investigate rock structures and the possibility of damning the Wainuiomata River. It is now open to the public as the Tana Umaga Track. At the eastern edge of the reserve is a water museum and the Lower Dam. This area was flooded in 2007 to create a wetland. == Native plant nursery ==