Mt Stuart Tunnel Track

Out and back

Highlights & Must-See Features

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.

Getting There

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!

Wildlife Spotting

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.

Seasonal Magic & Practical Tips

This trail is a true four-season destination, but each time of year brings its own flavour:

• Spring: The bush is bursting with new growth, and the birdlife is particularly active and noisy.
• Summer: The deep shade of the trees and the cool interior of the tunnel provide a welcome relief from the Otago sun.
• Autumn: This is perhaps the most beautiful time to visit, as the exotic oaks and elms turn brilliant shades of gold and orange, carpeting the track in leaves.
• Winter: The air is crisp and clear. While the tunnel can be a bit damp and drippy, the lack of foliage on the exotic trees allows for better views of the surrounding hills.

• The Torch is Non-Negotiable: As mentioned, the tunnel is 442 metres long. Your phone light might do in a pinch, but a proper headlamp or torch makes the experience much safer and allows you to see the rock formations and glow worms properly.
• Footwear: The track is well-formed, but the tunnel floor is often damp and can be slightly uneven. Sturdy walking shoes or boots with good grip are highly recommended.
• Layers: Even on a hot day, the tunnel is cool. Bring a light jacket or fleece to pop on while you explore the interior.
• Hydration: There are no water stops along the 13km route, so ensure you carry enough water for a 4-hour excursion.

Local & Regional Context

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.

After the Walk

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:

• Must-Hang Cafe & Bakery: If you like your coffee with a side of nostalgia, this is the place. It’s a quirky, diner-style cafe with unique decor and a very welcoming vibe. They are known for their generous portions—perfect for refilling the tank after a long walk. Their milkshakes are legendary!
• Forum Cafe: For a more classic local experience, head to the Forum Cafe. It’s a staple in the Milton community, offering great coffee, delicious cabinet food, and a rotating display of local artwork. It’s a lovely, bright spot to relax.
• The Annapurna Indian Cuisine: If your walk ends a bit later in the day, treat yourself to a dinner here. The flavours are authentic, the service is incredibly friendly, and the portions are hearty enough to satisfy even the hungriest hiker.

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.

10.7km away

A welcoming local coffee shop in Milton known for its quality coffee, classic breakfast and lunch options, and vibrant local artwork.