A gruelling 4 day hike brought us from the banks of the Urubamba river to the citadel at Machu Picchu to witness the sunrise from the sun gate. Although the hike is only around 50km in distance, it is at altitude. We spent a few days acclimatising but the first two days on the hike were tough. particularly climbing up to dead woman's pass. Overall it was an amazing experience and I'd do it again in a heartbeat.