Bring 1-2 x pairs of hiking trousers – 1 is fine for 3/4 day treks, an additional pair is ideal for treks greater than 4 days. Hiking trousers from Craghoppers or Fjällräven are great. You may prefer to take convertible trousers, for example these by Craghoppers are brilliant. Also bring one pair of trekking shorts. read more
The other answers outline a permit and porter required hike in the Incan Trail. In January I hiked the Alternate Salkantay trail which is free, a bit longer, and arguably a bit tougher. read more
Here's our guide for what to pack for Machu Picchu and your 4 Day Inca Trail Hike, plus additional tips to prep you for your trip. Happy trekking! read more