How long does the walk take?

It’s a 2km return track and should take 1-2 hours, depending how much time you spend marveling at the glow worms and the scenery.

How difficult is the walk?

It’s a grade 3 walk, so medium difficulty.

Do I need to book?

No booking needed! The Glow Worm Tunnel Walking Track is an open track and the glow worms are in a natural environment. All you’ll need to do in advance is make sure you bring a torch, as it’s dark inside.

When is the best time to go?

The tunnel can get quite busy so you might be better off getting there a little earlier in the day, or going on a weekday if you’re spending a long weekend in the mountains. The road is unsealed so it’s also recommended to drive back while it’s still light.

Where to eat nearby?

The closest restaurant is The Country Kitchen at The One & Only Wolgan Valley Resort, otherwise there are a number of warm and friendly restaurants in nearby Lithgow too.

What to bring for your Glow Worm Tunnel visit?

Essential items include a reliable torch or headlamp (bring spare batteries), sturdy waterproof footwear or hiking boots, and a change of socks. The tunnel floor has running water that can be ankle-deep in places, so your feet will likely get wet. Pack water, snacks, and sun protection for the walk to the tunnel, as the forest section is exposed in parts. A light rain jacket is recommended as weather in Wollemi National Park can change quickly. If you're planning a picnic at the fern clearing beyond the tunnel, bring something to sit on as the ground can be damp.

How do I get to The Glow Worm Tunnel Walking Track from Katoomba?

Getting to the Glow Worm Tunnel Walking Track from Careel Cottages in the centre of Katoomba takes around 1 hr 30 min by car, via the aptly named Glowworm Tunnel Road.

At the end of the road you’ll find the Glowworm Tunnel Parking Lot, at the beginning of the track.

It’s worth noting that the road to the tunnel is unsealed with some potholes, so it’s probably best to go there in a 4wd. An alternative way to get there is via the Great Western Highway towards the One and Only Wolgan Valley resort, then continue from there to the Glowworm Tunnel Parking Lot, which some people might find easier.

What are glow worms and why do they live in the tunnel?

The glow worms you'll see in the tunnel are actually the larvae of a species of fungus gnat. They produce their distinctive bioluminescent glow to attract prey into sticky silk threads they hang from the tunnel ceiling. The abandoned railway tunnel provides the perfect dark, damp environment these little critters need to thrive, with consistent moisture and shelter from weather and predators.
The glow worms are most active in darkness, which is why you need to turn off your torch to see them properly. When your eyes adjust to the darkness, you'll see what looks like a starry night sky on the tunnel ceiling - thousands of tiny blue-green lights creating a magical display.

How can I take photos of the glow worms in the Glow Worm Tunnel?

You can of course take pictures of the glow worms on your phone, without flash. And if you want to photograph the glow worms really well you’ll need specific camera settings and a bit of patience. You'll ideally want a camera capable of long exposures, a sturdy tripod, and a remote shutter release or timer to avoid camera shake. 
Most importantly, be respectful of other visitors and the glow worms themselves. Only use red light filters on torches when setting up shots, as regular torch light can disturb the glow worms and spoil the experience for others. Flash photography is strictly prohibited as it can harm the glow worms.

What is the best time of year to see glow worms?

Luckily, glow worms can be seen year-round in the tunnel, as they maintain their lifecycle throughout all seasons. However, the best time of day to see them is when the tunnel is darkest. This is typically mid-morning through late afternoon when there's less light coming in from the tunnel entrances!
For the absolute best viewing experience, visit on overcast days or during the darker months (May through August) when ambient light is lower. Early morning visits (around 8-9am) or late afternoon can also provide excellent viewing with the added benefit of fewer crowds.
Avoid visiting during the middle of summer days when bright sunlight can come further into the tunnel entrances, reducing the darkness needed to see the glow worms clearly.