Trekking the Inca Trail: the four-day walk to Machu Picchu
The Inca Trail is not the only way to reach Machu Picchu, and it is not the hardest trek in Peru. What it is, uniquely, is a walk along a surviving section of the Inca road network that ends by arriving at the citadel on foot, through the Sun Gate, in the way it was designed to be approached.
That combination of archaeology and terrain is why the route is capped, permitted, and booked out months in advance. It is also why a lot of people arrive underprepared for the altitude, having read about the ruins and skimmed the profile.
Trek at a glance
- Difficulty: moderate to challenging, driven by altitude rather than technical ground
- Duration: 4 days on the classic route, 2 days on the short version
- Best season: May to September
- Start point: Cusco, with the trailhead in the Sacred Valley
Overview
The classic Inca Trail runs roughly 43 kilometres over four days and three nights, starting in the Sacred Valley of the Urubamba and finishing at Machu Picchu. The path is largely original Inca construction: cut stone steps, paved sections, and tunnels, linking a series of ruins.
The defining obstacle is the second day. The route climbs to Warmiwañusca, commonly translated as Dead Woman's Pass, at roughly 4,215 metres, higher than anything else on the walk and higher than Cusco. It is a long ascent on stone steps at altitude, and it is where the trek is won or lost for most people. The days either side are shorter and gentler.
Days three and four are the reward. The trail contours along a high ridge through cloud forest, passing the terraced sites of Runkurakay, Sayacmarca, Phuyupatamarca, and Wiñay Wayna, before the final morning walk to the Sun Gate and the first view down onto Machu Picchu.
A short version, sold as the two-day or one-day Inca Trail, starts at the railway point known as KM 104 and joins the classic route at Wiñay Wayna. It covers the final stretch and the Sun Gate arrival without the high pass, and it suits travellers who cannot commit four days or who are uneasy about the altitude.
Permits, and why you cannot simply turn up
This is the single most important planning constraint, and it is not negotiable.
Independent trekking on the Inca Trail is not permitted. Every walker must be part of a group led by a licensed operator, and every walker needs a permit issued in their name. The number of permits released per day is capped, and that cap includes guides and porters as well as trekkers, so the number available to visitors is smaller than the headline figure suggests.
Permits are released for the year and are commonly exhausted for the peak months well in advance. If your trip is built around walking the Inca Trail in the dry season, book the trek before you book the flights.
Two further practical points. Permits are issued against passport details, and the passport you book with is the one you must carry on the trail. And the trail closes each February for maintenance and conservation, so a February itinerary needs an alternative route.
If permits are gone for your dates, the Salkantay and Lares routes are the usual alternatives. Neither ends at the Sun Gate, and both join the train or the road for the final approach to Machu Picchu, but both are substantial Andean treks and neither is permit-capped in the same way.
Getting there
Everything starts in Cusco. Flights from Lima reach it in around an hour and a half, and operators run pre-trek briefings in the city the evening before departure.
From Cusco, the trailhead is reached by road into the Sacred Valley, most commonly via Ollantaytambo, and the classic route begins at the checkpoint near KM 82 on the railway line. Operators handle this transfer as part of the trek. The return is by train from Aguas Calientes, the town below the citadel, back to Ollantaytambo or Cusco.
Give yourself at least two full days in Cusco or the Sacred Valley before the trek starts. This is not padding. It is the acclimatisation that determines whether day two is hard work or genuinely miserable. Our Cusco travel guide covers what to do with those days.
Best time to go
May to September is the dry season in the Peruvian Andes and the main trekking window. Days are clear, the stone steps are dry, and the ridge sections on days three and four actually have views.
June to August is the busiest period, and permits for these months go first. It is also the coldest, with sub-zero nights at the higher camps under clear skies.
May and September are the strongest compromise. The rains have finished or have not yet begun, the highland vegetation is still green, and the trail is marginally less crowded.
October and April sit on the shoulders and are a genuine gamble on weather. November to March is the wet season, with afternoon rain, slippery stone, and cloud that regularly removes the views entirely. February is closed.
What to bring
Altitude and the daily temperature swing are the two things to plan for. Nothing on the route is technical, but a great deal of it is stone steps, and a lot of people underestimate how cold a camp at 3,600 metres gets after dark.
- Broken-in walking boots with ankle support. The descents on original Inca steps are hard on feet and knees.
- Trekking poles with rubber tips, which are required on the trail and which materially reduce the load on your knees.
- A warm sleeping bag rated well below the overnight temperatures you expect, plus a liner.
- Insulating layers including a down or synthetic jacket for camp, and a windproof waterproof shell.
- Sun hat, high-factor sun cream, and sunglasses. Andean ultraviolet at altitude is severe even on cold days.
- Head torch with spare batteries, for early starts and camp after dark.
- Water treatment, tablets or a filter, and capacity for at least two litres.
- A basic first aid kit including blister treatment, rehydration salts, and any personal medication.
- Your passport, which is checked at the trail entrance and which you will want at Machu Picchu.
- Insect repellent for the lower cloud forest sections on days three and four.
Operators impose a weight limit on what porters carry for you, so pack for the limit rather than discovering it at the briefing.
Safety and altitude
The Inca Trail is a walking route, not a mountaineering objective, and the risks are correspondingly ordinary: falls on wet stone, knee injuries on long descents, and altitude.
Altitude is the one to take seriously. Warmiwañusca at roughly 4,215 metres is high enough for altitude sickness to be a real possibility in trekkers who have come straight from sea level. Arriving in Cusco two or three days early and sleeping at 3,400 metres, or lower in the Sacred Valley, is the standard and effective precaution.
Confirm the altitude ceiling on your travel insurance before you travel. Many standard policies cap trekking cover well below 4,215 metres, which would leave you uncovered for the highest part of the route. Cover for medical evacuation matters here too, because the middle of the trail is a long way from a road.
Peru currently sits at a caution-level advisory for British travellers, with the UK Foreign, Commonwealth and Development Office issuing region-specific guidance rather than a single national position. Check the current advisory from your own government before booking and again close to departure. The emergency ambulance number in Peru is 106.
Visa and entry
Peru is visa-free for short tourist stays on most of the passports Yoogo tracks, including Swiss, British, American, Australian, and German, though the maximum permitted period varies by nationality. Indian passport holders currently need a visa arranged in advance.
Check the Peru destination page for the status that applies to your passport, confirm it against Peru's immigration authority at gob.pe/migraciones, and see our Peru entry requirements guide for the full pre-departure checklist. Because trail permits are issued against passport details, get any passport renewal done well before you book the trek rather than after.
Getting connected
There is no usable coverage across most of the trail, and you should not plan on being reachable between the trailhead and Aguas Calientes. What a data connection is genuinely useful for is the days either side: confirming the Cusco briefing, checking train times for the return, and handling the timed-entry arrangements at Machu Picchu.
An eSIM covers that without hunting for a shop in Cusco. Saily covers Peru, so the plan is bought and installed before you fly and activates on arrival.
If eSIMs are new to you, what is an eSIM? covers the basics, and how much mobile data you need helps size the plan for a two-week Peru trip.
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Frequently asked questions
How difficult is the Inca Trail?
Moderate to challenging. The ground is not technical, but the route is largely stone steps at altitude, and the second-day climb to Warmiwañusca at roughly 4,215 metres is a sustained ascent. Fitness helps, but acclimatisation helps more.
How long is the Inca Trail?
The classic route is roughly 43 kilometres over four days and three nights. A short version starting at KM 104 covers the final stretch in one or two days and joins the classic route at Wiñay Wayna.
Do you need a permit for the Inca Trail?
Yes, and it is issued in your name against your passport details. Independent trekking is not permitted, so you must book through a licensed operator. Daily permit numbers are capped and peak-season dates commonly sell out well in advance.
When is the best time to trek the Inca Trail?
May to September, the Andean dry season. May and September offer the best balance of settled weather and slightly thinner crowds. February is not an option, because the trail closes that month for maintenance.
How high is the highest point of the Inca Trail?
Warmiwañusca, usually translated as Dead Woman's Pass, at roughly 4,215 metres. It is the highest point on the route and higher than Cusco.
How many days should I spend in Cusco before the Inca Trail?
At least two full days, and three is better. Cusco sits at 3,400 metres, and sleeping at that height before you start is the most effective thing you can do to make the second day manageable.
What happens if Inca Trail permits are sold out for my dates?
The Salkantay and Lares treks are the usual alternatives. Neither is capped in the same way and neither finishes at the Sun Gate, but both are substantial multi-day Andean routes that end with a visit to Machu Picchu by train or road.
Can you walk the Inca Trail without a guide?
No. Every trekker must be part of a group led by a licensed operator. This applies to both the classic four-day route and the short version.
Do you need a separate ticket for Machu Picchu if you walk the Inca Trail?
Entry to the citadel is arranged as part of the trek booking, and timed entry with a guide is now required for all visitors. Confirm exactly what your operator has included, and check the official site for current access arrangements.
Is the Inca Trail suitable for children or older walkers?
It depends far more on altitude tolerance and comfort on long descents than on age. The two-day route from KM 104 avoids the high pass and the camping, and it still finishes through the Sun Gate, which makes it the more realistic option for mixed-ability groups.