One of the toughest tracks, in one of the most remote and rugged locations in New Zealand. So remote in fact that you can only access it by boat or by helicopter. The Dusky Track takes 6-8 days of tough walking through very hard steep and wet terrain. The walking is in temperate rainforest over two mountain ranges and up three valleys.
The track is so remote, I only passed 8 other walkers on the 6 days I took the walk the trail.