Analysing terrain data
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The exposure grade describes the potential consequences of falling or slipping off the path.
Low Exposure: The path is on completely flat land and potential injury is limited to falling over.
Medium Exposure: The trail contains some obstacles such as outcroppings and rock which could cause injury.
High Exposure: Some trail sections have exposed ledges or steep ascents/descents where falling could cause serious injury.
Extreme Exposure: Some trail sections are extremely exposed where falling will almost certainly result in serious injury or death.
The photo-famous granite towers of Paine rise from a Southern Andes sub-range that stretches roughly east-west.
It is crowned by snowy peaks and furrowed by glacier-carved gorges.
The W route travels up and down three parallel valleys via a traverse of the southern side of the range.
The O Circuit continues this route around the north side, through a broad valley, over a high pass, and across a traverse above a massive glacier.
The track mapped here is the O extension only.
See also Torres del Paine W Trek, and combine the two for the entire O Trek. Considerably fewer people see the unique O scenery than view the scenery from the W side.
Besides the extra length and difficulty of the O, the national park sets a limit of 80 people per day traveling the backside, as opposed to no formal limit on the W.
Thus, you should buy your camping permits far in advance if you want to do the O.
The rewards for diligent planning and intrepid trekking are days of relative solitude among flowery meadows, deep forests, and jagged peaks.
You will, of course, also see the more classic sights of Torres del Paine—Glaciar Grey, Los Cuernos, Valle Frances, Las Torres, and all the rest—by completing the W as part of the O.
You must be self-sufficient for camping when trekking the O.
The W portion of the circuit has the option of staying in campsites, refugios, or lodges at various places along the way.
The portion unique to the O has only campsites.
A few campsites have luxuries of cook huts, running water, and hot showers, but you will still need your own tent and other sleeping gear.
Pack strategically to stay comfortable in the blustery and rainy climate of Patagonia.
Renting equipment and/or hiring a guide are options for the O Circuit, but you can also do it on your own with proper campsite reservations. Sources: https://www.goatsontheroad.com/ultimate-guide-trekking-camping-o-circuit-torres-del-paine-chile/ https://en.wikipedia.org/wiki/Torres_del_Paine_National_Park http://www.torres-del-paine.org/map-tdp.html