I’ve been hiking the Blue Mountains in every season for the better part of a decade, and autumn is my favourite. The summer crowds thin out dramatically after Easter, the heat drops from oppressive to pleasant, and the light changes — softer, warmer, hitting the sandstone cliffs at lower angles that make everything glow.

The Blue Mountains are about 90 minutes west of Sydney, and they offer some of the best bushwalking in the country. Here are the trails I keep coming back to when the leaves start to turn.

Grand Canyon Track

Distance: 6.3km circuit Time: 3-4 hours Difficulty: Moderate

This is the walk I recommend to anyone visiting the Blue Mountains for the first time. It drops from Evans Lookout Road into a deep, narrow canyon that feels like a different world — lush ferns, overhanging rock walls, and light filtering through the canopy in shafts.

In autumn, the canyon holds moisture from early rain, and the ferns are at their greenest. The temperature inside the canyon is noticeably cooler than the rim, which is perfect on warmer autumn days. You’ll walk through natural tunnels carved into the rock, past a small waterfall (more of a trickle in dry years, but it’s still pretty), and up a metal staircase bolted into the cliff face.

Start from Evans Lookout car park and go clockwise — the descent into the canyon is gentler in this direction. The climb out via Rodriguez Pass is steep but short.

Autumn tip: Start early. The canyon gets its best light in the morning, and the car park fills up by 10am even in the shoulder season.

National Pass

Distance: 5km one way (or 10km return) Time: 4-5 hours return Difficulty: Hard

National Pass is one of the most spectacular walks in Australia, full stop. It traverses a cliff face below the Valley of the Waters, following a ledge that was hand-carved into the rock by convict labour in the 1900s. The path is narrow — barely a metre wide in places — with a sheer drop on one side and a sandstone wall on the other.

The walk passes several waterfalls: Queen Victoria Falls, Empress Falls, and the Wentworth Falls themselves. After decent rain, these are genuinely impressive. In dry autumn periods, they’re more subdued but still worth the walk.

The section between Wentworth Falls and Conservation Hut involves over 900 steps — both up and down. This isn’t a casual stroll. Bring water, proper shoes, and knees that work. According to the NSW National Parks Service, hikers should allow at least 4 hours for the full circuit and be prepared for steep, uneven terrain.

Autumn tip: The shorter daylight hours matter on this walk. Start by 9am if you’re doing the full circuit to ensure you finish in daylight.

Ruined Castle

Distance: 14km return (via the Scenic Railway route) Time: 5-7 hours Difficulty: Hard

If you want a proper day hike with a memorable payoff, the Ruined Castle delivers. It’s a rock formation on the floor of the Jamison Valley that looks, from certain angles, like the ruins of a medieval castle. Getting there involves a significant descent into the valley, a walk through dense eucalypt forest, and a final scramble up to the formation itself.

The most popular route starts at the Scenic Railway bottom station (buy a one-way ticket down — saves 300m of steep descent) and follows the Federal Pass through the valley floor. The forest down here is different from the ridge tops — tall, quiet, with filtered light and occasional clearings.

The final approach to the Ruined Castle requires some rock scrambling. Nothing technical, but you’ll use your hands. The views from the top — looking back at the Three Sisters and the cliff line — are among the best in the Blue Mountains.

Autumn tip: Pack a warm layer. The valley floor is sheltered and can be cold in autumn mornings, especially in the shaded sections. By contrast, the top of the Ruined Castle is exposed and warm in the afternoon sun — perfect for lunch.

Prince Henry Cliff Walk

Distance: Up to 7.5km one way Time: 2-4 hours depending on how much you walk Difficulty: Easy to moderate

For a less demanding option that still delivers spectacular scenery, the cliff walk between Leura Cascades and Katoomba follows the cliff edge past multiple lookouts. You can walk the whole thing or just do sections.

The highlights are the lookouts — Gordon Falls, Elysian Rock, and the spectacular Bridal Veil Falls viewpoint. Each one gives you a different angle on the Jamison Valley and the cliff line. In autumn, the afternoon light on the sandstone is genuinely stunning.

This walk is mostly flat, with some steps at various points. It’s accessible for reasonably fit families with older children and makes a great introduction to Blue Mountains bushwalking without the commitment of an all-day hike.

Autumn tip: Do this walk in the late afternoon for the best light. The cliff faces catch the western sun and turn orange and red in the last hour before sunset.

Fortress Ridge Loop

Distance: 4.5km circuit Time: 2-3 hours Difficulty: Easy to moderate

A less-known walk near Blackheath that takes you through heath and woodland to a series of exposed sandstone platforms with panoramic views of the Grose Valley. It doesn’t have the drama of National Pass or the adventure of the Ruined Castle, but it’s a beautiful, quiet walk that rarely has more than a handful of people on it.

The trail passes through banksia and hakea scrubland that comes alive with birds in autumn — honeyeaters are everywhere, feeding on the last of the autumn flowers. The lookout points along the ridge give you uninterrupted views across a valley that stretches to the horizon.

I especially like this walk for a morning outing when I don’t want to commit to a full day. Start at the Fortress Creek car park on Hat Hill Road and follow the signs. The track is well-marked but unmaintained in places — expect some uneven ground.

Practical Tips for Autumn Hiking in the Blue Mountains

Layers are essential. Autumn mornings can be 5-8 degrees at the ridge tops, warming to 18-22 by midday. In the valleys and canyons, it stays cooler all day. Bring a warm mid-layer and a light waterproof jacket.

Check the weather. Autumn in the Blue Mountains brings fog, sudden temperature drops, and occasional heavy rain. The Bureau of Meteorology forecast for Katoomba is your best friend — check it the night before and morning of your walk.

Carry enough water. There’s no reliable water source on most of these walks unless you’re carrying a filter. In autumn, 1.5-2 litres per person is usually sufficient for a full-day walk.

Leeches. They’re around in autumn, especially after rain and in damp valley locations. Tuck your pants into your socks, apply DEET repellent to your boots and lower legs, and check yourself periodically. They’re harmless but unpleasant if you’re not expecting them.

Getting there. The Blue Mountains are accessible by train from Sydney Central — about 2 hours to Katoomba. Many trailheads are walking distance from stations or a short bus ride. This is genuinely one of the best things about the Blue Mountains — you don’t need a car if you plan well.

The Blue Mountains in autumn are a quieter, more beautiful version of the summer experience. The trails are the same, but the cooler air, the softer light, and the absence of crowds make them feel like a different place entirely.