How to Plan an Overland Trip Through South America

An overland trip begins long before you turn the car key. For those thinking about their first time, planning seems like an intimidating task. So many countries, so many decisions, so many technical details. The good news is that overland planning is more about order than quantity. Those who follow a clear order discover that big decisions unlock many small ones, and what looked like a mountain becomes an executable list within a few weeks.

This guide is for people starting from zero. It works for a short trip (2 to 3 weeks around Argentina) or a long one (months crossing all of South America). The size changes. The order of the decisions does not.

In short: planning an overland trip has five steps in order: decide destination and duration, draw the route, refine it with support points, handle the practical preparations (vehicle, documents, currency, connectivity, health), and get ready to use the app during the trip. Most people get stuck at the second step because they try to do everything on Google Maps, looking at the road stretch by stretch. There is a lighter way.

Step 1: Decide destination and duration

The first question is not "where to?" It is "how much time do I have?" Time dictates destination, not the other way around.

• 7 to 10 days: fits a border trip (all of Uruguay, northern Argentina from Foz or Posadas, Atacama leaving from northern Brazil). For those who have never crossed a border by car, it is the ideal first-time format.
• 15 to 30 days: partial Argentine Patagonia, a loop through the vineyards (Mendoza and Cuyo), Atacama with the Bolivian southwest, or a long route within Brazil (Pantanal and Chapadas, Estrada Real, Caminhos do Sertão).
• 30 to 90 days: full Patagonia in Argentina and Chile, the entire Ruta 40 of Argentina, a loop through the five countries of the River Plate basin, or a descent to Ushuaia returning along the Pacific.
• Over 90 days: a continental trip, with or without a planned return. Here the "destination" stops being a fixed point and becomes an open region.

Rule of thumb: underestimate how much you can see, overestimate how much you need to stop. Most beginners plan 1,000 km a day and find out in practice that they enjoy it more at 400 to 500. On an overland trip, slower is almost always better.

Step 2: Draw the route

This is the step where most people get stuck. You open Google Maps, trace the route, and the result is a line between A and B that does not account for what lies in between. Maps shows the road, not the context: which region is worth stopping in, what kind of landscape you will cross, which town has decent lodging, which border crossing is simplest, which stretch is pavement and which is ripio (gravel).

This is where GT Overlander comes in. Instead of drawing the route line by line, you open "New Itinerary" and describe the trip in natural language to the GT AI: "I want to go from São Paulo to Bariloche in 25 days, passing through vineyards and stopping in historic towns," for example.

The AI returns the route with the path, stop cities and regional context: not just the kilometers, but what justifies each stop. If the itinerary goes through Cuyo, it explains why the detour is worth it. If it makes sense to cross the border at Pehuenche instead of Cardenal Samoré, it explains why. The AI takes care of the route. You take care of the decisions.

The result already comes drawn on the map, inside the app itself. From there, you move on to step 3.

Step 3: Refine with support points

With the route set, what is missing is what fills the trip: gas stations in the right stretches, lunch restaurants in a good town, campgrounds or inns for the overnights, viewpoints that justify the stop, attractions worth a short detour.

On the GT map, you turn on category filters: gas stations, lodging, camping, restaurants, attractions, restrooms, workshops. And they can be combined, all at once or only the ones that matter for this trip. The important part: only the points relevant inside the route corridor appear. No screen clutter, no 500 icons that are useless for the path you are taking.

For each interesting point, you click the icon and it goes into the route with one click, at the right position along the path, without you having to reorder anything. The drawn route updates automatically. In a few minutes, what was a line becomes a complete itinerary, looking like someone who has already made the trip.

When you are satisfied, a button exports the full route to Google Maps. It opens there already set up for real navigation.

Start planning your trip on GT Overlander, available in the app (iOS and Android with CarPlay) and directly in the browser.

Step 4: Practical preparations

With the route drawn, now comes the part many people underestimate and that almost always disrupts the first day. There are five fronts:

• Vehicle: a full service 30 days before departure, covering suspension, brakes, clutch, belts, fluids, battery and tires. On a long trip, urban maintenance is not enough. What seems small (CV joint boot, suspension bump stop) becomes a serious problem on ripio.
• Documents: International Driving Permit, Green Card, DUT, owner's authorization if the car is not yours, minor's authorization if traveling with a child. Without any of these, the border does not let you through.
• Currency and money: an international card with no IOF, cash dollars and local currency in small amounts for tolls and corner stores. Each country has its nuances: Argentina accepts cards almost everywhere, Bolivia requires cash, Uruguay accepts cards easily.
• Connectivity: a combination of local SIM and international eSIM for the first days at the border. For those who work while traveling or take a remote route, Starlink Roam becomes a strategic investment. Without internet, an offline map app and a dedicated GPS become a real necessity.
• Health: tetanus vaccine up to date, yellow fever, first aid kit and international insurance. Going to Bolivia or Peru? Pay double attention to altitude: coca tea and gradual acclimatization.

What matters is fitting all this into the calendar with room to spare: at least 45 days before departure, so documentation, vaccines and the big service do not squeeze you.

Step 5: On the road

A good part of what decides the success of the trip happens during it, not before. Here GT continues to be a central tool, in a different mode.

The Waypoint Radar shows, in real time, everything around your current position, with the same category filters as in planning. Need a pharmacy urgently in a town you do not know? Filter "health" and the radar shows the nearest one. A restaurant you had not planned for appeared and you want to stop? Filter "food" and see what is within a reasonable radius. Each radar icon starts direct navigation in Google Maps from your position to the point.

This is the "living trip" mode, when the itinerary stops being rigid and adapts to what comes up. A better campground than the planned one, a viewpoint that was not on the list, an emergency mechanic shop, a gas station on a deserted route. Planning well beforehand does not mean fixing everything. It means being able to improvise safely along the way.

Frequently asked questions

How long does it take to plan an overland trip from scratch?

For a short trip (up to 2 weeks) with documentation already in order, you can wrap it up in 2 to 3 weeks of planning. For a long international trip with a first border crossing, count at least 45 to 60 days, considering vaccines, IDP, Green Card and the big vehicle service.

Can I plan everything on the computer, or do I need to install the app?

Both work. The web version has the same features when you are logged in: AI chat, map, filters, export. The mobile app becomes useful when it is time to use it on the road (Radar, CarPlay).

Does planning with AI make a difference compared to drawing on Google Maps?

A big difference. Maps shows the shortest path between two points. It does not tell you which region is worth the detour, which border crossing is simplest, which town has good lodging, or where the pavement turns to ripio. The GT AI works with regional and cultural context, the kind of thing that normally takes weeks of research in forums and blogs.

What if I cannot follow the itinerary to the letter during the trip?

Nobody does. An overland itinerary is a reference, not a contract. Its job is to give you a comfortable starting structure. What changes during the trip is part of the value of the experience. That is why the Radar works in real time: the route can change but the discovery infrastructure is still there.

Can I redo the route during the trip if something changes?

Yes. Everything you planned stays saved, and you can edit it at any time: add stops, remove them, change the order, export to Maps again. A good trip is one that changes midway.

Wrapping up

Planning an overland trip is not a talent, it is a process. Those who follow the order of the five steps, destination, route, support points, practical preparations and tools to use during the trip, arrive at the starting line with a clear head, not an incomplete checklist. The difference between those who enjoy the first seven days and those who suffer through them lies here, in honest advance planning. And the best part: every trip you plan, you plan faster. The first is the hard one. The next ones are almost just deciding where to go.