The Inca Trail, and the month it closes to rest

The classic Inca Trail runs a little over forty kilometres from a checkpoint known simply as Kilometre 82, on the railway line west of Cusco, to the Sun Gate above Machu Picchu, following a stone path built by the Inca as part of a much larger network of royal roads that once linked the empire from Ecuador to Chile. Most itineraries walk it over four days, climbing through cloud forest and high Andean grassland, past a sequence of Inca sites along the way, before arriving at Machu Picchu on the final morning through the Sun Gate rather than by bus, the approach the site's original builders intended.

A path built for an empire, not for tourists

The trail's engineering is, in its own quiet way, as impressive as anything at Machu Picchu itself: stone paving laid across gradients that would defeat a modern path built to the same width, drainage channels cut to shed monsoon rain without washing the surface away, and way stations, tambos, positioned at intervals that suggest careful planning for relay runners and travelling officials rather than casual use. Several substantial ruins sit directly on the route, Runkurakay, a round structure thought to have served as a lookout or rest post, and Winay Wayna, a terraced complex close enough to the trail's end that many walkers see it as their first proper Inca site of the trip, well before Machu Picchu comes into view.

Dead Woman's Pass, and the day that decides the trek

The trek's hardest single stretch is the climb to Warmiwanusca, or Dead Woman's Pass, at 4,215 metres, the trail's highest point and the test most walkers remember longest: a long, steady, breathless climb through thinning air, rewarded with a view back down the valley that makes the effort plain rather than merely claimed. Acclimatisation in Cusco beforehand matters considerably here, since altitude sickness is a genuine risk for walkers who arrive straight from sea level and attempt the pass without a day or two to adjust.

Why the route closes every February

Peru closes the Inca Trail entirely for the whole of February each year, a deliberate piece of conservation rather than a response to weather, though February does fall within the wettest stretch of the Andean rainy season. The closure allows maintenance crews to repair the stone paving, clear drainage channels and let the trail's ecosystem recover from a year of heavy foot traffic, work that would be considerably harder to carry out around a continuous stream of trekking groups. It is one of the clearer examples of a heritage site being actively managed for its own long-term survival rather than simply kept open for as long as demand holds.

Permits, and planning further ahead than usual

Because access to the trail is limited by a strict daily permit system, and because the trek's popularity means those permits are allocated well in advance, this is one of the few walks in the world where booking months ahead is not caution but necessity. Travellers set on a specific departure window, particularly across the busy dry-season months of June to August, generally need to commit considerably earlier than they would for most escorted holidays.

Because permits sell out months ahead for the popular dry-season dates, several operators also offer alternative routes to Machu Picchu that avoid the permit system entirely, approaching instead through the Sacred Valley by road and rail, or via longer trekking routes such as the Salkantay path, which climbs even higher than the Inca Trail itself before descending to meet the same rail corridor into Aguas Calientes. None of these carries quite the same historical weight as walking an original Inca road to the Sun Gate, but they remain a genuine option for travellers who leave booking too late for the classic route.

The dry season, May to September, gives the most reliable underfoot conditions and the clearest mountain views, though it also means walking alongside the largest number of fellow trekkers; the shoulder months either side offer a reasonable compromise between weather and crowds, February aside, when there is no choice to make at all.