Lost World Trail

Overview

This is a classic Lower Blue Mountains adventure: a steep, rugged out-and-back linking Martin’s Lookout with Lost World Lookout across the Glenbrook Creek gorge. Expect big sandstone cliff vistas, a tranquil creek interlude, and a thigh-burning return climb. Most walkers take 3–4 hours for the return trip. Distance varies with side detours, but plan on roughly 4 miles total (6–7 km return).

Terrain and Difficulty

It’s a medium–hard undertaking with around 500 m of total elevation gain. The track drops sharply from Martin’s Lookout to Glenbrook Creek, then climbs to the opposite rim before returning the same way. Underfoot you’ll get rough natural singletrack, rock steps and ledges, occasional scrambles, and a rock-hop creek crossing that can be slippery when wet. The path is generally clear, but in the valley some forks are less distinct—basic navigation skills help.

Highlights

• Dual cliff-edge viewpoints: broad panoramas from both Martin’s Lookout and Lost World Lookout.
• Glenbrook Creek: a lush change of mood at the valley floor with riparian forest and shade.
• Sandstone scenery: classic Blue Mountains escarpments, weathered rock shelves, and caves—keep an eye out for Sharks Head Cave along the way.

Flora, Fauna, and Geology

You’ll travel through open forest and heath on Triassic sandstone—archetypal Blue Mountains country shaped by long-term erosion. In spring, wildflowers brighten the ridges. Birdlife is a perk here; listen and look for Gang-gang Cockatoos and Scarlet Robins around the edges and in quieter valley sections.

Best Time to Hike

Autumn and spring have the most comfortable temperatures and the best chance of wildflowers. Winter is crisp and great for the big climbs if you layer up. Summer can be hot and exposed—start early, carry extra water, and be mindful of bushfire conditions.

Logistics and Tips

• Start at Martin’s Lookout carpark (no public transport). This is a true return hike—pace yourself for the steep exit climb.
• Bring plenty of water and snacks; there are no facilities on the track.
• Footing can be loose and slick, especially near the creek. Good shoes and trekking poles help.
• Navigation: a GPS track or map is useful for the less distinct sections near the valley and creek crossings.

If you want a short, easy stroll, this isn’t it. But if you’re fit and up for a rugged, rewarding Blue Mountains workout with serious views, it’s a standout.