Trekking or hiking is an activity for all kinds of people, regardless of their weight or if they do not have an excellent physical condition, everyone can walk. It allows to go through different places, to be in direct contact with nature and it is cheaper than other sports, since the equipment is more basic. 
To practice trekking you need a good pair of shoes and clothes , sunglasses, sunscreen, a hat, compass, map, water, food, knife, backpack, flashlight and medicine cabinet.
Some articles may seem an exaggeration, but you always have to go one step ahead of accidents and hazards, besides that the time in the region can change quickly, and it is better to prevent.
The place where you practice trekking is chosen by yourself, and you can leave without a guide, as the trails are well marked and marked, but it is recommended to give notice to the authorities or at the nearby administrative points of the destination and the estimated time what to take in return. Never leave alone and without warning.
When going for a walk, keep in mind to hydrate regularly, as well as on a bicycle it is recommended to drink a drink of water every fifteen minutes, pay attention to your body while walking and hydrate it when you need it. Similarly, rest for five minutes every hour, help you catch your breath.
In Patagonia there are hundreds of routes to walk, only in the Torres del Paine National Park there are dozens of trails to choose from. For this reason, find out about the available trails and, later, the ones you will go through. So avoid getting lost.
In Torres del Paine, the most important trails are:
Trail to the Towers: This walk lasts one or two days and starts at the Laguna Amarga nursery, where one of the access doors to the National Park is located. From there you walk for thirty minutes until you reach the Las Torres Inn, a place of rest and from where you can organize horse riding or walking, among other activities. Continue along the Ascencio River, and after a four-hour walk you will reach a lagoon at the foot of the mythical Torres. In the place there are camping spaces available, in the shelter Las Torres and the Chilean Refuge.
Glacier Trail and French Valley: this trip ends in about three days. The shortest walk starts at Pudeto, where you will cross Peho Lake by boat and arrive at the Peho refuge. From there you walk for four hours until you find the French Glacier, next to a wonderful valley. The trip to Peho can also be done from the Administrative Headquarters, walking for five hours until arriving at the Peho refuge.
Salto Grande: in Pudeto you can start the trip to the Salto Grande, from where a two-hour walk takes you to the viewpoint of Lake Nordenskjold, with a privileged view of the French valley and the Macizo del Paine.
Macizo del Paine trail: it is the longest route, since it lasts between six and ten days. It starts at Laguna Amarga, where the eight-hour journey begins on foot towards Lake Paine. Three hours more they take it to the Dickinson Lake and bordering the Los Perros river is reached after four more hours to a glacier, near which you can camp. The following section is somewhat dangerous, covered in snow and without visible demarcations, known as John Garner, which is recommended to be done with a guide. Four hours takes to cross this step, that finalizes in the Gray glacier. Six hours to the south end at the Gray refuge, and four more hours by Lake Gray, end at Peho, where you can see the French valley and the Paine massif. This trip ends up walking back to the Administrative Headquarters, walking for 5 hours, or taking a boat that crosses Lake Peho to Pudeto.
Trail W: it is a six-day circuit, during which you walk along Lake Nordenskjold and the Ascencio River until you reach the Torres del Paine. You walk, then, to the Cuernos del Paine and the French valley, where you can see the Massif from afar and know the Gray glacier. It is returned by boat, crossing Lake Peho.
Laguna Verde: lasts one day, in which forests are crossed and smaller lagoons are known. You can see the Macizo del Paine and Los Cuernos, on the southern shore of Lake Sarmiento. At the end of the walk you will reach Laguna Verde, next to which there is a hostel where you can eat and catch your breath.
In addition to the Torres del Paine, you can practice trekking in almost all parks and national reserves of the country. Although most of them do not charge, it is possible that a cooperation bonus is requested, which, in any case, does not exceed two dollars.
Some trails have several days of duration, since they are circuits that include the visit to a more extensive territory. Since these trips include camping, be careful not to leave trash and stay in designated areas. Leaving these areas can have consequences, such as encountering animals or areas infected with Hanta virus. Take special care with the liter, a kind of shrub that causes allergies.
Other well-known trails, further south are:
Puelo: Following the path along the Puelo River, the path crosses the Argentine side until you reach Lago Puelo in that country.
Caleta Santa María: in Tierra del Fuego, explore the Darwin mountain range walking through a place barely touched by man. The walk lasts a few hours and ends at Estancia Yendegaia.
Isla Navarino: In Puerto Natales, where the climate is demanding and changing. This trail is remote and has no signposting, so it is recommended only for experts. It is a humid place, where the winds are strong and it can rain at any time.
Further south, in Puerto Natales and Punta Arenas, ice trekking takes place. This practice is much more complicated and demanding than normal trekking, so take into account your previous experience in the discipline. To walk and climb the glaciers, you must contact a guide at a travel agency or tourism, as it is very dangerous to go up without someone who knows the ground with certainty