Ausangate Treks and the 7 Lakes from Cusco

The trail is never technical — no scrambling, no exposure, no equipment beyond boots and poles. What makes it demanding is the altitude and the repetition: five to seven hours of walking a day, for three to five days, never below 4,300 m and crossing passes up to 5,096 m. The one-day tour to the seven lakes is much gentler, a few hours out and back from Pacchanta, and most reasonably fit travellers manage it.

Two days in Cusco (3,399 m) before the one-day tour, and three before any of the camping treks. Coming straight from the coast or from Lima and walking into a camp at 4,400 m is the single most common cause of a trip that goes wrong. An extra night in Pacchanta beforehand is the best acclimatisation you can buy.

All three walk the seven lagoons and finish at Rainbow Mountain, but they take different amounts of the mountain. Three days is the compact circuit along the eastern flank. Four days adds the Ausangate pass at 4,870 m and a camp beside the Ausangate lagoon, with shorter daily stages. Five days is the complete loop, with Palomani at 5,096 m and Q'ampa at 5,070 m, and nothing on the route repeated.

On the treks you sleep in tents the crew pitches for you, at Upis, Surapata, Anantapata or beside the Ausangate lagoon — all above 4,400 m. A sleeping bag rated to −5 °C is included, and nights regularly drop below freezing in the dry season. On the two-day Rainbow Mountain and 7 Lakes route you sleep in a guest house in Pacchanta instead, with beds and blankets.

No. Pack horses carry seven kilos per person between the camps, packed in a soft duffel, and you walk with a daypack holding water, camera and the day's layers. Anything you do not need on the mountain stays in your hotel in Cusco.

No — the community entrances are paid in cash on the route, and each community charges its own: S/ 20 for Pacchanta, Upis, Surapata and Anantapata, S/ 25 for Rainbow Mountain and S/ 30 for the Red Valley, which is optional. Bring it in small notes; there is nowhere to pay by card. The exact list for your route is on its tour page.

An oxygen tank and a first-aid kit travel with every departure and the guide is trained to use both. The standard response is to stop, give oxygen and lose altitude — descent resolves almost every case quickly, and on the treks an emergency horse is there on groups of more than five. Tell your guide early rather than pushing on quietly.

April through October is the dry season: clear skies, the strongest colour on the lagoons and the most reliable camping. Between November and March it rains frequently, the passes can hold fresh snow, and cloud sits on the range for days at a time. June to August are the coldest nights and the clearest days.