Any of the Lares trekking trails go through the Urubamba mountain range and its considered high altitude trek that comes with obvious altitude sickness risks. But an accurate acclimatizing to the high altitude is a key factor in ensuring you have a safe and memorable trek to Machu Picchu, is also very important to talk to the travel agent about your level of fitness or the physical activities you do. So they can advise you an appropriate plan of acclimatization before you go trekking on Lares valley tour.
We recommend that you take a moment to read our detailed guidance article on altitude sickness. Travelers are suggested to arrive in Cusco at least 2 or 3 days before to go on the Lares trek to Machu Picchu and do some of the activities as the: Cusco city tour, Sacred Valley tour or Huchuy Qosqo day hike which are great suggested activities to help in the process of acclimatization to the altitude.
Acclimatization process can be totally different in each person, in some people it will take longer time than others, to get a good acclimatization to the high altitude, is important to consult to the doctor before you travel to Peru, so you can get the prescription of the medicines that will help you to be acclimated to the high altitude.