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Arnold Valley Road, near Stillwater
1.7 km
1 hour
100 metres
If you are looking for a slice of West Coast magic that combines industrial history with some of the most stunning native forest in the South Island, you have found it. The Arnold River Dam Walk is one of those hidden gems that locals know and love, but many tourists accidentally zip right past on their way to Greymouth or Christchurch.
Tucked away in the Arnold Valley, just a short drive from the serene shores of Lake Brunner, this 1.7km loop track is a masterclass in "short but sweet." It’s an easy stroll that takes about an hour, making it the perfect leg-stretcher for families, history buffs, or anyone who just wants to soak in the earthy scent of a kahikatea forest without committing to an all-day mission.
The journey begins at the Arnold Power Station, a site that feels like stepping back in time. This isn’t just a modern concrete block; it’s a fascinating relic of early New Zealand hydroelectric innovation, having been hummed into life back in 1932. As you set off from the car park, the first thing you’ll notice is the sheer scale of the engineering. You’ll pass the impressive power station building before crossing the Arnold River.
The crossing itself is a bit of a highlight—you often walk via a pipe structure that channels the rushing water toward the powerhouse. It’s a great spot to pause and look down at the churning river below, feeling the power of the water that has been generating electricity for the region for nearly a century.
Once you’re across, the track plunges into a stand of magnificent native forest. This isn’t just any bush; it’s a lush, verdant canopy of kahikatea, miro, and rimu. The transition from the industrial vibe of the dam to the prehistoric feel of the forest is almost instantaneous. The track is well-formed but does climb gently as you head toward the top of a terrace. With an elevation gain of only 100 metres, it’s enough to get the heart rate up slightly without ever feeling like a "grind."
As you wind your way through the dense, regenerating bush, the trail takes you across sturdy boardwalks that traverse swampy sections. These areas are fascinating, offering a glimpse into the damp, mossy ecosystems that thrive in the West Coast's high rainfall. Eventually, the path leads you back down toward the river crossing, completing a loop that feels much more remote than it actually is. It’s an easy-going track that is perfectly suited for kids, though you’ll want to keep a close eye on them near the river and the industrial structures.
Parking is available to the right of the Arnold River Power Station, located on Stratford Road, off Arnold Valley Road. The track officially begins just past the pipeline bridge.
Get DirectionsKeep an eye out for these native and local bird species along the trail
Best time: Year-round
Hemiphaga novaeseelandiae
New Zealand wood pigeon, a large native bird with iridescent green and purple plumage. Important for seed dispersal of native trees.
Best time: Year-round
Refuel after your hike at these nearby spots
12km away
A convenient local general store and cafe in Moana, offering barista-made coffee, food to go, and essential groceries, serving as a community hub.
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Loop
What makes this trail truly worth the detour? For starters, the scenic viewpoint at the top of the terrace is a total showstopper. From here, you get a sweeping, dramatic vista looking down over the Arnold River Dam and the river as it snakes through the valley. The contrast between the dark, dense forest and the open, shimmering water of the dam is a photographer's dream.
Speaking of the forest, keep an eye out for the "ancient giants." There are some incredible examples of multi-trunked rimu, totara, and rata scattered along the loop. These are the survivors and descendants of a forest that once covered much of this region before the logging and mining eras.
If you happen to be visiting between April and July, look down as much as you look up. This is the peak season for forest fungi, and the Arnold River Dam Walk is famous for it. The forest floor becomes a miniature wonderland of bright reds, neon purples, and earthy browns as various species of fungi emerge from the leaf litter.
To find this West Coast treasure, head along Arnold Valley Road, which connects Stillwater (near Greymouth) to Moana (at Lake Brunner).
While it is a bit of a drive from the main highway, the road is scenic and takes you through some beautiful pastoral and bush-clad landscapes.
The West Coast is famous for its birdlife, and the Arnold River Dam Walk does not disappoint. The combination of the river, the dam (which creates a small lake above), and the dense forest provides a variety of habitats.
The Arnold River Dam Walk is a fantastic year-round option, but each season brings a different flavour:
This area is a fascinating tapestry of New Zealand history. Long before the power station was built, the Arnold Valley was a hub for gold mining. Hardy miners once worked these rivers and terraces, hoping to strike it rich. As you walk the trail, you are retracing the steps of those who shaped the early West Coast economy.
The Arnold Power Station itself is a testament to the "can-do" attitude of the 1930s. It was a significant project during the Great Depression, providing much-needed jobs and paving the way for the electrification of the Coast. Today, it remains a working piece of heritage, managed with a nod to its historical importance.
From a Māori perspective, the wider Lake Brunner (Te Kotuku Whakaoka) area is culturally significant as a traditional site for food gathering (mahinga kai) and as a link between the East and West Coasts. The lushness of the forest you see on the walk is a reminder of the original state of the land before European settlement.
Once you’ve finished your loop and filled your lungs with that crisp forest air, you’ll likely be ready for a treat. You have a few great options nearby:
The Arnold River Dam Walk might be short, but it packs a massive punch. Whether you're here for the history, the birds, or the incredible viewpoint, it’s a rewarding experience that captures the very soul of the West Coast.
Anthornis melanura
Endemic songbird with bell-like calls. Males are olive-green with a purple head sheen; females are browner with a narrow white-yellow stripe across the cheek.
Best time: Year-round
Rhipidura fuliginosa
Small insectivorous bird with distinctive fan-shaped tail. Friendly and curious, often following walkers through the bush.
Best time: Year-round
Gallirallus australis
Flightless rail known for bold, inquisitive behaviour. Found mainly in the South Island and some offshore islands.
Best time: Year-round
Apteryx haastii
New Zealand's largest kiwi species, the roroa is nocturnal and, while rarely seen, its distinctive call can sometimes be heard during twilight walks in the Bealey Valley.
Best time: Year-round (Nocturnal)
12km away
Located within the historic Hotel Lake Brunner in Moana, this restaurant and bar offers delicious local cuisine, a seasonal menu, and stunning views over Lake Brunner.
35km away
A stylish cafe, bar, and restaurant situated in Greymouth's Town Square, known for its excellent coffee, diverse menu, and inviting atmosphere.
35km away
Housed in a historic Greymouth building, this ale house serves hearty southern pub fare alongside a range of traditional Speight's ales, perfect for a post-hike meal.