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Milton
13 km
3 hours 48 minutes
120 metres
If you’re looking for a trail that perfectly blends Otago’s rugged railway history with the tranquil beauty of the New Zealand bush, look no further than the Mt Stuart Tunnel Track. Located just a stone’s throw from the township of Milton, this 13-kilometre return journey offers a fascinating glimpse into the 19th century, wrapped in a lush, green corridor of native and exotic trees.
Whether you’re a local looking for a weekend leg-stretcher or a tourist exploring the "Deep South," this section of the Clutha Gold Cycling and Walking Trail is a must-do. It’s a track that rewards you with every step, culminating in a walk through a hand-blasted railway tunnel that feels like stepping back in time.
Setting off from the Mt Stuart Reserve, the first thing you’ll notice is the atmosphere. This isn't just any old bush walk; it’s a journey through a living museum. The trail is well-formed and generally easy-going, following the path of the historic Tokomairiro–Lawrence Railway line. Because it was designed for trains, the gradients are remarkably gentle—the 120-metre elevation gain is spread so evenly across the 13 kilometres that you’ll hardly notice the climb.
As you begin your walk, the path winds through a stunning collection of mature specimen trees. You’ll find yourself walking beneath the towering canopies of sequoias, oaks, limes, and Dutch elms. Many of these giants were planted over a century ago, and there’s something incredibly grounding about walking amongst trees that have stood silent witness to the region’s evolution.
The terrain is firm and undulating, making it a fantastic choice for families. While it is a bit of a distance at 13km return, the "out and back" nature of the track means you can turn around whenever you like. However, if you have the time (allow about 3.75 hours), the full trip is well worth the effort. The track feels secluded and peaceful, providing a sense of escape from the hustle and bustle of State Highway 8, which is never too far away but feels worlds apart once you’re under the forest canopy.
As you approach the mid-way point, the scenery shifts slightly, offering glimpses of the rolling Otago heartland. The mix of exotic woodland and native bush creates a unique microclimate—cool in the summer and beautifully crisp in the winter. Just remember, while this is a kid-friendly adventure, it is a no-dogs zone, so you’ll need to leave your four-legged friends at home for this one.
Ample parking is available at the Mt Stuart Reserve, which serves as the trailhead for the track. The reserve is conveniently located on Rhodes Road, just off State Highway 8, approximately 10-15 minutes northwest of Milton, before reaching the Manuka Gorge.
Get DirectionsKeep an eye out for these native and local bird species along the trail
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
Rhipidura fuliginosa
Small insectivorous bird with distinctive fan-shaped tail. Friendly and curious, often following walkers through the bush.
Best time: Year-round
Refuel after your hike at these nearby spots
10.5km away
A quirky diner-style cafe known for its unique decor, nostalgic atmosphere, and generous portions, offering a hearty post-hike meal or delicious milkshake. [cite: 22 in previous turn, 26 in previous turn]
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Out and back
The undisputed crown jewel of this hike is the Mt Stuart Tunnel (also known as the Glenore Tunnel). Reaching the tunnel entrance feels like discovering a hidden portal. Constructed between 1875 and 1876, this 442-metre-long tunnel is a marvel of Victorian-era engineering.
Unlike many tunnels from that period that were meticulously lined with bricks, the Mt Stuart Tunnel features raw, blasted rock. It gives the interior a rugged, cave-like aesthetic that is incredibly atmospheric. Walking through it is an experience in itself; the air temperature drops, the sounds of the bush fade away, and you’re left with the rhythmic sound of your own footsteps on the damp ground.
Pro tip: Bring a powerful torch! While the light from the exits provides a dim glow for a short distance, the middle of the tunnel is pitch black. Once you’re deep inside, try turning your light off for a moment. If you stay quiet and let your eyes adjust, you can often spot the magical blue-green glow of glow worms clinging to the ceiling. It’s a moment of pure Kiwi magic that never gets old.
Aside from the tunnel, the Mt Stuart Reserve at the trailhead is a highlight in its own right. It’s a picturesque spot for a pre-walk picnic, surrounded by those majestic 100-year-old trees. For the photography enthusiasts, the contrast between the dark mouth of the tunnel and the vibrant green ferns surrounding it makes for an iconic "Otago" shot.
Finding the trailhead is a breeze. The Mt Stuart Tunnel Track begins at the Mt Stuart Reserve, which is located on Rhodes Road, just off State Highway 8.
If you’re driving from Milton, head northwest for about 10 to 15 minutes. You’ll pass through the small settlement of Glenore before reaching the reserve. Keep an eye out for the signs; the reserve is well-marked and offers ample parking. It’s the perfect staging area, with plenty of space to get your gear sorted before you hit the trail. If you reach the Manuka Gorge, you’ve gone a little bit too far!
The Mt Stuart Tunnel Track is a haven for native birdlife. Because the track moves through both exotic forest and native bush, you get a wonderful variety of species.
Keep your ears open for the distinctive, heavy "whoosh-whoosh" of the Kererū (New Zealand Pigeon). These chunky birds are common year-round and are often seen perched precariously on thin branches, gorging themselves on berries. You’ll also likely be accompanied by the inquisitive Fantail (Pīwakawaka), which loves to follow hikers to catch the insects stirred up by their footsteps.
If you’re lucky, you might hear the melodic chime of the Bellbird (Korimako) or the complex, soulful notes of the Tūī. Both are occasional visitors to the area, particularly when the native trees are in flower. Look out for the tiny Silvereye (Wax-eye) flitting through the shrubs in social groups. The best time for birdwatching is early morning or late afternoon when the bush is at its most vocal.
This trail is a true four-season destination, but each time of year brings its own flavour:
The Mt Stuart Tunnel Track is a vital link in the Clutha Gold Cycling and Walking Trail, one of New Zealand’s "Great Rides." This trail is famous for telling the story of the region’s gold mining past and its agricultural heart. Throughout the wider trail, you’ll find informative panels that share the history of Māori seasonal migrations, the arrival of pioneering run holders, and the hard-working settlers who built the railway.
The tunnel itself was part of the branch line that connected the main trunk to the goldfields of Lawrence. Building a tunnel through solid rock in the 1870s was back-breaking work, and walking through it today serves as a reminder of the sheer grit of the early Otago residents. The area is also geologically interesting, sitting on the edge of the Tokomairiro plains, an area that has been central to Otago’s farming success for generations.
Once you’ve finished your 13km trek, you’ll likely be ready for some refreshments. Luckily, the nearby town of Milton (just 10 minutes away) has some fantastic options:
The Mt Stuart Tunnel Track is more than just a walk; it’s an exploration of Otago’s heritage and a peaceful retreat into nature. Whether you're there for the history, the glow worms, or the 13km workout, it’s a journey you won’t soon forget.
Prosthemadera novaeseelandiae
Endemic New Zealand honeyeater with distinctive white throat tuft and iridescent plumage. Known for its complex and beautiful song.
Best time: Year-round
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
Zosterops lateralis
Small bird with distinctive white eye-ring. Commonly seen in flocks, feeding on insects, fruit, and nectar.
Best time: Year-round
10.7km away
A welcoming local coffee shop in Milton known for its quality coffee, classic breakfast and lunch options, and vibrant local artwork.
10.9km away
An authentic Indian restaurant offering a diverse menu of traditional flavours, generous portions, and friendly service, perfect for a satisfying dinner.