Winding through the picturesque Tararua Forest Park in the Manawatu-Whanganui region, the Mangahao Power Station Road offers a unique journey into the history of New Zealand's early hydroelectric developments. Originally built to support the Mangahao Power Station, this well-graded gravel road takes you past the dams that feed the station, with scenic views and a real sense of connection to the country's engineering heritage. It makes an easy day trip out of the wider Wellington region and is reliably popular.

The road is a well-formed gravel route, suitable for most vehicles including 2WD with some ground clearance, though it is narrow with blind bends in places, so drive carefully and watch for oncoming traffic and walkers. A few gentle side tracks branch down to the river and into the hills, adding interest for those keen to explore. As you ascend, the forest closes in for a remote, tranquil feel.

Near the first dam you'll find Arapeti, a small self-contained campsite run by a local landowner, alongside an informative display on the station's history. Note there is no cellphone coverage in places.